Su Su listened for a long time and sorted out a lot of information from the conversation between the high priest and Yan Bai.

First, Yan San was the person he wanted to investigate, the man behind the Undercurrent organization.

Although Su Su had some guesses before about Yan San being the man behind the scenes, it was only now that he was completely certain.

Second, Yan San and the high priest used to be very familiar with each other, and even had a cooperative relationship at one time. Now the relationship between the two sides is still ambiguous. However, the high priest is opposed to Yan San's current plan, but he is limited by the agreement between the two parties and did not directly organize it.

Third, Yan San has changed a lot, at least in the eyes of the high priest. He may have really just wanted to change the life of the mermaids at the beginning, but who knows what he went through later, and he became what he is now.

Fourth, when Dark Current was first established, it was only established to protect the mermaids, and there were no such strange plans. The plan came after Yan San changed.

Combined with what the high priest said before, Su Su made a bold guess: "Yan San is not Yan San. Could he be a Zerg? Well, this can explain why his plan only benefits the Zerg."

When Su Su said this, the high priest and Yan Bai, who were originally at loggerheads, were both stunned. The originally tense atmosphere suddenly eased.

Yan Bai chuckled and looked at Su Su helplessly: "Pfft - don't guess, I don't think that's what the high priest meant."

The high priest couldn't help but smile: "Yes, I just think people's hearts are fickle. Maybe Yan San's experiences have made him act more extreme and not like his original self. It doesn't mean that he has really changed into a different person."

Su Su blinked his eyes: "Is that so? It turns out that I was wrong. I was thinking that he was so wholeheartedly trying to help the Zerg Clan kill us, maybe he was an undercover sent by the Zerg Clan."

Yan Bai shook his head: "Father's words and deeds have never changed much. There is no such thing as being parasitized by someone. Besides... your imagination is too rich. I have never heard that the Zerg have such ability. Besides, with the defense line of thousands of star ranges in front of the space station, can the Zerg really sneak into the interior of the planet without making any noise?"

"That's right." Seeing that both of them denied it very confidently, Su Su didn't continue to guess.

Yan Bai finally rejected the high priest's suggestion and sent the people off the boat.

After Su Su and Yan Bai separated, he contacted Qi Hanyi again, shared his new intelligence with him, and casually mentioned that he suspected Yan San was a Zerg.

Su Su treated the matter as a joke: [Just now the high priest said Yan San was not the same Yan San as before. I thought she meant that someone had changed inside the shell, so I asked if it was a Zerg. It turned out that what she meant was that the other person's personality had changed a lot. Hmm, it seems that I still don't understand human language.]

[Yan Bai said that I have too much imagination, how can there be such abilities of the Zerg. But I don't think so. The Zerg are so strange in appearance and have so many abilities. Maybe they really have such transformation and disguise skills, but we just don't know.]

The ship was approaching the port of Liberty Island. After editing this message, Su Su prepared to close the communication.

But almost immediately, he received a message from Qi Hanyi.

[There are such bugs. I saw three of them in the space station a few months ago.]

Qi Hanyi was talking about the time when the space station data was lost and stolen. After all, it involved military secrets, and he had never mentioned the details of that battle to Su Su.

【Three Zergs disguised themselves as humans. With the help of a Defense Bureau insider named "Chongzhou", they successfully infiltrated the space station outpost. After their identities were exposed, they almost caused mass casualties in the space station by self-detonating. Chongzhou has many economic dealings with Dark Current. I followed the clues and found the Dark Current organization. If Yan San is also a Zerg, it would make more sense. Why is an organization belonging to mermaids secretly in contact with Zergs?】

In Qi Hanyi's opinion, Su Su's imagination is very bold and his logic is very simple and crude. He will suspect whoever his plan benefits.

But the simpler and more direct the logic, the more likely it is to be the truth. Since those three Zergs were able to sneak into the space station, why couldn't there be Zergs who were good at disguise and entered the interior of the planet earlier?

If Yan San's body was indeed taken over by the Zerg, then he might have been planning something for the past decade or so. On the surface, he was stirring up confrontation between mermaids and humans under the pretext of revenge for the mermaids, but in fact, he was using the mermaid community to realize his own plans.

[Your guess is not impossible. If he is really a Zerg, he can devour Yan San and become his appearance, so he can devour others. Yan Bai, as his adopted son, is likely the next body he prepared for himself. He asked Yan Bai to take you to Freedom Island, and he may also have the purpose of gaining control of the Bai Ze starship by devouring you.]

【After arriving on the island, be careful. If you find something wrong, leave immediately and return to the sea. Yan San has been in the shipping business for many years, but he has never been out to sea. He even rarely goes to the pier. If he is a Zerg, his weakness may be water.】

Su Su had never thought that his casual guess would be confirmed by Qi Hanyi. He even gave him such a long and well-reasoned analysis.

Maybe I really guessed it right this time? If so, I must remind Yan Bai to prevent him from being robbed by the other party when he is completely unprepared.

Thinking of this, Su Su hurried to Yan Bai's room. He no longer hid the fact that he was secretly communicating with Qi Hanyi, and took the initiative to show the content of his communication with Qi Hanyi to Yan Bai.

"Let me make it clear that I don't mean to sow discord between you and your adoptive father, but Yan San could really be a Zerg!"

Yan Bai's first reaction was disbelief, but as he finished reading the content of the message, his expression gradually became solemn.

"Qi Hanyi said that my father was secretly in contact with the Zerg? And that he had financial dealings with their undercover agents among humans? I have never heard of this."

Compared to Qi Hanyi who is hostile to him, Yan Bai trusts his adoptive father who raised him since childhood more.

It is very simple to verify this matter. Qi Hanyi can find out the economic transactions between Chongzhou and Anliu, so if he wants, he can do the same.

Yan Bai found Lin Dian and planned to ask him to investigate through the internal system to see whether this financial transaction really existed.

"No need to investigate, I know Chongzhou." To Yan Bai's surprise, Lin Dian said directly when he heard the name, "He is the boss's spy planted in the Defense Bureau. His confidentiality level was secretly changed by me after I hacked into the military system."

Yan Bai couldn't hold back his expression this time. He used to think that although Yan San had no blood relationship with him, he always treated him better than his own son and never hid anything from him. Since he started to do things, he was given the greatest power.

Mr. Yan San said, you are the future of Undercurrent and the future of mermaids. I am giving you these responsibilities now to train you better. But Yan Bai was kept in the dark about the heavy boat from beginning to end and had no idea about it.

Yan Bai confirmed some details with Lin Dian and confirmed that a few months ago, when Yan San went to perform the substitute mission, he did contact Chongzhou once. The timeline completely matched the time when Qi Hanyi went to perform the emergency mission.

Yan Bai was frightened and broke out in a cold sweat. For the first time, he realized that the person he trusted the most had become a little strange.

Lin Dian was usually only interested in things related to the system, and other matters were decided by Yan Bai and Yan San. So he only helped a little with Chongzhou's affairs, and didn't know anything more specific.

But it's easy to investigate.

Lin Dian has always been in charge of the internal communication system of Undercurrent. When Yan Bai said he wanted to check, Lin Dian quickly retrieved the relevant information about Chongzhou and the specific content of the missions he had received.

Shigefusa himself is a human with a very clean background. From the video, he looks gentle and refined. He studied at the Imperial University and had excellent grades. This is also the reason why he was able to pass the screening and successfully enter the Defense Bureau.

But in reality, he was a high-IQ criminal who was sadistic and enjoyed killing people. He killed people almost every month. The first three times, he escaped the investigation of the Empire through various means. Until the fourth time, he killed a mermaid belonging to the Undercurrent Organization. The Empire's surveillance department did not find him, but Yan San found him through the code left by the mermaid.

After that, Yan San obtained a lot of evidence of the man's murder through surveillance for a period of time.

Yan San gave him two choices: either join the Defense Bureau and work for him, where he could get both money and freedom. Yan San could also provide him with convenient conditions so that he could satisfy his hobby of killing people without being discovered.

Either that evidence turns up at the Sheriff's Department and he gets the death penalty.

Chongzhou chose to join the Defense Bureau. Even though he knew that doing so meant helping the mermaids fight against humans, he would rather die with everyone else than die himself.

The following missions assigned to Chongzhou were mostly to help Anliu hide his tracks or report information. There was only one special mission when Yan San asked him to add and modify the data of three space station guards in the system, just before the intelligence leak occurred.

After investigating to this point, even if Yan Bai was unwilling to accept it emotionally, he had to consider the possibility that Yan San was a member of the Zerg tribe in disguise.

Otherwise, Yan San is a mermaid, how could he allow a villain who tortured and killed mermaids to become a member of the undercurrent? No matter what, Yan Bai couldn't figure it out.

Yan Bai changed his mind. He called back the high priest who had left and agreed to her request - to hand over the rescued mermaid to her care.

The high priestess was naturally happy with this result. She had not left too far. After receiving the message, she immediately turned back and brought a team of mermaid guards to help shelter the mermaids.

After handing over the rescued mermaids, the high priest looked at Yan Bai with some curiosity: "I'm more curious, what made you change your mind in such a short time?"

Yan Bai didn't want to answer. He was in a very confused mood. On the one hand, emotionally he still hoped that there was some misunderstanding, but rationally, he had to be responsible for the lives of others and take action to deal with the possibility that Yan San was a Zerg.

"Because Yan San might be a Zerg. If he is remembered, his existence will be a huge threat to both humans and mermaids. Handing these mermaids over to him will be equivalent to increasing the number of hostages." Su Su spoke of this matter without any burden at all.

"This is just a guess and cannot be confirmed." Yan Bai struggled.

"So we have to find a way to confirm this." Su Su looked at the high priest: "Regarding this matter, we may need the assistance of the high priest and the Mermaid Kingdom. If Yan San is really a mermaid, Freedom Island is not safe. We have to escape back to the sea and then return to the empire. We will need someone to pick us up."

Although the high priest was surprised by this reason, since even Yan Bai acknowledged this possibility, it meant that they must have very strong evidence.

"I hope this is true." The high priest sighed, thinking of Yan San who was full of light and said that he would set up an organization to protect mermaids. At least this shows that the mermaid she knew at that time has not changed beyond recognition.

"If Yan San really has a problem, we are willing to help you leave Freedom Island and bring the information to the Imperial Military."

Yan Bai turned his head to look at Su Su: "How do you want to verify it? Give him a physical examination? I have seen my adoptive father's annual physical examination reports. He ages and gets sick like a normal old man. Apart from that, there is nothing abnormal."

Su Su thought of a simple and crude method: "The fighting ability of the Zerg is generally stronger. If it is attacked fatally, it may reveal its true form."

Yan Bai refused without a second thought: "Just for this possibility, I can't let you do anything to my father."

Lin Dian nodded in agreement. In the entire Undercurrent, the two people he was most attached to were Yan San and Yan Bai. The young man used his smart mind to think about something other than the procedure for a while: "Maybe we can prepare a drug that is only effective against Zerg and give it to the boss. If he is a human, it will have no effect."

The high priest, who was more proficient in medicine, rejected this plan immediately: "We don't have biological samples of the Zerg. Besides, the physiques of the Zerg vary greatly. What works for one species may not work for other species."

"Why don't I try it myself?" Yan Bai said. He needed an answer, but he didn't want to cause any harm to his adoptive father, so he decided to take the risk on himself. "As Qi Hanyi analyzed, if he is really a Zerg, then I am the next body he has prepared for himself. If I show any disobedience to his plan, break free from his control, or even split the undercurrent in half and stop him at all costs, he will definitely choose to devour me in advance."

"If he attacks me, it means he is really a Zerg. If he doesn't, then this speculation is not valid."

After finalizing the plan, Yan Bai calmed down. "Su Su, you have difficulty walking on the shore. If Yan San is really a Zerg, you will be the most dangerous. So you stay with the high priest and wait for Lin Dian's signal. If something happens to me... or if I am 'fine' but he dies, you must tell Qi Hanyi about this and have the military send people to Freedom Island to kill all of us who are still alive. You must promise me to save as many mermaids as possible. They don't have any bad intentions. They just chose the wrong path like me."

"If we are all alive, it means he is fine."

Su Su shook his head and said, "No, even if he is really a Zerg, we have already taken the initiative. Can't you think of a more comprehensive plan? Do you have to go and die?"

"You don't understand, Su Su. Even if he is really a Zerg, all these years... he picked me up, raised me, taught me the principles of life, and taught me how to do things." Yan Bai: "If he is really an enemy, a Zerg, I have no choice but to give up my life to repay his kindness."

"You have to understand, if he is a Zerg, then he raised you for himself, taught you these things, gave you rights, all to pave the way for his future. It's like... if a person raises a pig and slaughters it for meat, should the pig also be grateful and wait to be slaughtered?" Su Su was so angry that he spoke without thinking.

Although the metaphor was harsh, it did make some sense. Yan Bai couldn't argue with him and fell silent for a moment.

Su Su sighed. He never thought that one day he would also rush to do something that would make him die for others. "I'll do it. I'm not very mobile, but I can lower his vigilance. Qi Hanyi said that his weakness is probably water. So, you put me in a house close to the sea and install a device on the floor. I will lie to him and say that Qi Hanyi has tied the control of Bai Ze to me. If he attacks me, I will immediately turn on the device and run away."

"Yan Bai, you can mobilize some members of the Undercurrent to take charge of the support work, which will be more convenient. Once I activate the mechanism, you will meet me at the other end of the mechanism and take me back to the sea."

"If he doesn't attack me, explain to him that we were just testing him and that I don't actually have control over the Bai Ze."