Early that morning, Hua Yao received a secret letter from the Dragon Empire. He thought it was just some routine reports, but he never expected that the content of the letter would make his tall body suddenly freeze.

This scene happened to be witnessed by two sisters who had just walked into the restaurant.

Ling Yuan and Gongzi Yan exchanged glances at the same time, but neither of them spoke.

It was not until Hua Yao gradually came to his senses and looked at the two sisters that they tilted their heads to look at him curiously.

"Godfather, what's wrong? You don't look well. Did something happen?"

Hua Yao's gaze gradually focused on Ling Yuan, "Girl, can you cure the zombie poison?"

Although this girl had not expressed anything before, he knew that she had caught several zombies in the past few days, which was enough to show that her desire for research had always existed.

Ling Yuan nodded, "There is no such thing as an uncurable poison in this world, it's just the complexity of the process. Just like my black and sharp poison, who would have thought that the solution is to put yourself in a desperate situation and then survive?"

Hua Yao's heart suddenly tightened: "So, you can cure the zombie poison at this stage?"

Ling Yuan nodded without comment. "I am quite familiar with this poison. I have come into contact with the zombie poison in its initial stage a few years ago. So it is not difficult for me to crack it with my current strength after it has evolved to this stage. It just takes time."

Back then, when she was in the forbidden area, someone wanted her to study this poison, but her brother refused.

That time was a critical period for her promotion. She had to give up even her favorite medical poison, let alone the poison from outside?

Perhaps it was because of the sense of responsibility that comes with being a doctor, that after she calmed down, the first thing she thought of was to detoxify the corpse poison.

This is not only a challenge to oneself, but more importantly, the poison has really reached a stage where it can no longer be allowed to develop.

With her current achievements, it would be a bit unreasonable for her not to focus on this.

So, she did what she thought she should do.

But she didn't quite understand.

Logically speaking, Hua Yao should have known that she was doing this a long time ago, so why didn't he ask earlier, but only asked about this after receiving the letter?

Could it be that something big happened in this letter?

As Ling Yuan expected, Hua Yao breathed a sigh of relief but also frowned.

"Someone in the Dragon Empire has already developed an antidote to suppress corpse poison."

Ling Yuan stood up in surprise. "This is good news. As far as I know, they have been researching for more than a year, right? Now that they have finally figured it out, shouldn't it be worth celebrating?"

Unexpectedly, Hua Yao shook his head and smiled sarcastically.

"Things are not as simple as you think. Moreover, the people who developed the antidote are not ordinary people. Moreover, the beneficiaries are the Four Continents. Do you think they will be as selfless as you?"

Ling Yuan frowned immediately after hearing this, "Foster father, what you mean is that although they have found the antidote, they are asking for too much?"

Hua Yao snorted coldly, "That's about what I mean. Another thing is that I don't trust them. Even if they promise to research it now, I still can't guarantee that their so-called antidote is an antidote to corpse poison."

"So, godfather, you want to...?"

Hua Yao stood up and said, "It seems that our time of reunion as father and daughter has come to an end. I must go and see how they developed the antidote, and bring some back for you to test. If it works, that's good. But I'm afraid that their purpose is not just this."

Ling Yuan frowned: "Foster father, is it so complicated?"

Hua Yao sneered and looked at the two sisters with a serious look: "Remember this, the factional struggles in the Dragon Empire and the viciousness of human hearts are far more brutal than those in the Four Continents by ten or a hundred times. In their hands, human lives are nothing at all. Otherwise, why do you think there are people like Long Kun and Hong Xie?"

"Little guy, whether the Four Continents can survive this disaster depends on you. Fortunately, the Never-Sleeping City is still safe now. You just stay here and don't go anywhere. Wait for me to come back. Do you understand?"

Gongzi Yan realized the seriousness of the matter and nodded immediately, "Don't worry, godfather, we will be careful. But I'm afraid there will be danger on your trip, so please be careful."

"Silly child, your foster father is not as weak as you think. Otherwise, your mother would not have entrusted you to my care. Don't worry, your foster father knows how to protect himself. On the contrary, you two sisters may have been exposed after this battle. You must be careful and don't trust anyone, especially those from the Dragon Empire."

Hua Yao gave repeated instructions before leaving with concern.

After he left, Ling Yuan looked at Gong Zi Yan, "Godfather just said that we might have been exposed. Could it be referring to our background?"

"No matter what it is, the first thing we need to prepare is the antidote for the corpse poison. Yuan'er, you should not do anything for now. Go into seclusion and study the antidote. As long as we get the antidote, we will be qualified to control everything."

She had a hunch that the unknown force was trying to use the antidote to the corpse poison to achieve its ulterior motives.

Although my godfather didn't say it explicitly, judging from the serious look on his face, the other party must be someone powerful.

How dare they look down on someone who has caught the attention of their adoptive father?

It seems that the enemies they will face in the future are far more serious than they imagined.

Ling Yuan raised her hand and snapped her fingers. "Sister, don't be nervous. You can't panic. If you panic, I will be under a lot of pressure. Don't worry, we are now in the City That Never Sleeps. There is no shortage of medicinal materials in the City That Never Sleeps. As long as there are enough medicinal materials, I, your sister, will research the antidote sooner or later."

"Since you have entrusted me with this difficult task, the safety of the City That Never Sleeps is now in your hands!"

Ling Yuan's self-confidence made Gongzi Yan feel inexplicably at ease. After sending her to the secret room, Gongzi Yan immediately changed into men's clothes and regained the domineering and restrained demeanor of the lord of a city.

At this time, they didn't know that what Hua Yao was worried about had actually happened already, but it just spread more slowly.

If the zombie poison is transmitted through blood, then this new type of virus is based on the corpse poison, but has mutated into an even more terrifying species. This type of species is not transmitted through blood, but is even more cruel than those transmitted through blood.

Unfortunately, this scene was witnessed by Yu Hen and Wei Jie who came after their wives.

What is even more coincidental is that these victims are none other than the Li family members rescued by Ling Yuan a few days ago.

Yu Hen and Wei Jie formed a team when they were killing zombies on the way. Even they themselves did not expect that in addition to zombies, there were new species approaching them.

When they landed, the tragedy was happening. The two men were stunned for a moment as they saw those new species pressing the women under them, torturing them madly, and injecting the fluids in their bodies into the throats of normal people.

After killing poisonous people for more than a year, they had never seen an alien like the one they witnessed at this moment.

Compared to the poisonous humans whose bodies will fester after being bitten by zombies, these new species do not have festering skin. Even their height is much taller than normal people. They have well-developed upper limbs and obviously much thinner lower limbs.

Although they are in human form, what makes them different from humans is that they have bat-like wings on their backs, and their bodies are covered with hideous patterns, which are not like scales, but are lumpy and bloated.

The facial shapes of these people have changed and their original appearance cannot be recognized. The eyes, mouths, and ears have mutated most seriously. Their fangs are more terrifying than those of zombies, their eyes are red, and they have fan-shaped ears like aliens. Their pointed mouths and monkey cheeks make their entire faces distorted beyond recognition.

Of course, these are not the main points. The most terrifying thing about these aliens is their long and thick things.

Compared to those zombies that no longer have human consciousness, these aliens can actually think and distinguish between men and women.

They pounce on women when they see them and bite men when they see them.

After being pounced on, women will become the targets of their abuse, and after being bitten, men will become like poisonous zombies within an hour, and their morphological characteristics will gradually become similar to those of these aliens.

What's even more terrifying is that at first their appearance is very unstable, but in the process of constant biting, especially during intercourse with women, their physical characteristics will become more and more obvious with the nourishment of the women.

In the same way, these aliens will become more crazy and addicted under the nourishment of women.

When zombies encounter these humans who have been infected by aliens, they will not actively bite them. This magical scene also tells them that there is actually some common toxin between zombies and aliens.

But it also tells them that in addition to zombies, there are more powerful aliens approaching ordinary people like them.