"Ew~~~, you're so dirty-minded!" The system, which hadn't been paid any attention to by Xiang Wan for a long time, finally couldn't help but speak up after a period of silence.

Xiang Wan ignored it and prepared to continue arranging the next steps. Judging from the current situation, Shi Liefeng had obviously tampered with the tiger, but she didn't know if the other servant had also fallen for his trick. Also, the two siblings' methods had only been revealed to the tip of the iceberg so far; it was impossible for her to subdue them so easily.

Fu Quan, under Xiang Wan's instructions, kept a close eye on the brother and sister. The lewd sounds coming from the room were unbearable to hear, and occasionally someone would sneak over to eavesdrop. As long as it wasn't about rescuing the two, Xiang Wan let them be.

Xuan Yuanlan's medicine was very effective; the two siblings were up to something for a whole day before they finally calmed down. When Xiang Wan and Xuan Yuanlan went in, the smell still lingered in the room.

"Ugh!" Xiang Wan covered her nose and ran outside, asking people to open all the windows to let the smell dissipate.

"Girl, why go through all this trouble? If you don't want Shi Liefeng to regain his former glory, wouldn't it be better to cut off the root of the problem directly?" Xuan Yuanlan said while examining the two men. "Anyway, these two aren't good people, why leave them as a source of trouble?"

"Huh? You can do that too?" Xiang Wan was reminded of this and immediately realized it, then grinned at Xuan Yuanlan.

"Don't look at me like that, your master can't do this."

"Really?" Xiang Wan's eyes darted around as she said, "Doesn't Master intend to investigate this?"

Xuan Yuanlan paused for a moment as she examined Shi Yuanyuan's eyes, then remained silent.

Seeing that there was a chance, Xiang Wan said, "These two people were able to give my father an illness that even you, Master, couldn't cure in one go. Perhaps they have a secret about my father's condition. Master, are you really not going to give it a try?"

“Although what you said seems to make a lot of sense,” Xuan Yuanlan glanced at Xiang Wan and smiled, “this is still helping you out, so how are you going to thank me?”

It's good that he agreed. Xiang Wan was afraid that he wouldn't be happy, so she couldn't ask someone else to do it.

"Hehe, Master, you said that as long as it is within my power, I will do my best."

Xiang Wan thought that Xuan Yuanlan, being a physician, would at most ask her to read more books and learn more about her medical practices; that wouldn't be much more. Little did she know how much she would regret agreeing so readily in the future.

After Xuanyuan Lan nodded in agreement, she placed the first-aid kit on the ground and gestured for Xiang Wan to go out first.

Although she knew the scene would be a bit shocking, Xiang Wan couldn't resist peeking. She quietly hid by the window and watched as Xuan Yuanlan used silver needles to completely knock Shi Yuanyuan unconscious, then tied up Shi Liefeng, gagged him with a rag, and then took out a gleaming, slender knife. After heating it in the candlelight, she lifted Shi Liefeng's clothes, raised her hand, and splattered blood all over the floor.

"Damn, that's brutal." Xiang Wan crouched down, her heart pounding. It was her first time doing something like this, and even though she hadn't done it herself, she still felt a little uncomfortable.

"If you want to see, why hide?"

Xuan Yuanlan gave Shi Liefeng some basic treatment, packed up her first-aid kit, and prepared to get up.

Xiang Wan gave an awkward smile and pushed open the door to go inside.

"The rest is up to you."

Xuanyuan Lan picked up the box and was about to leave when Xiang Wan grabbed her arm.

"Master, aren't you going to take another look?"

"I've got everything, I need to go back and study it."

Amidst the evening's enigmatic smile, Xuan Yuanlan's old face flushed slightly, and she stepped aside and walked out.

Looking at his back, Xiang Wan had a feeling that her future days wouldn't be so easy.

Shi Liefeng had already fainted from the pain and lay on the ground, his body twisted to one side. The bloodstains on his lower body hadn't been wiped away, making it look rather frightening.

"Fuquan, Fuquan, come in quickly and take him to the side courtyard, don't let him die."

Xiang Wan had the bloodstains wiped clean again, leaving Shi Yuanyuan lying there alone. She walked up to her, lifted her eyelids, and looked inside. She saw a faint blue tinge around the outer edge of her black pupils. The blood vessels in the whites of her eyes were very visible, and upon closer inspection, it seemed as if tiny things were moving within them.

"Huh, what's this?" Xiang Wan brought the candle closer and looked more closely, only to find that the subtle movements were gradually subsiding. She moved the candle to the other side and looked again, seemingly discovering a problem: these subtle movements seemed somewhat afraid of light.

Xiang Wan blocked part of the light source with her hand, and when she looked at Shi Yuanyuan's eyes again, she found that the whites of her eyes seemed to have come alive, like insects swimming around.

"Ah!" Xiang Wan was so startled that she sat down on the ground with a thud.

In modern times, she was terrified of parasites and the like; just one look at them could make her feel nauseous all day. Now, caught completely off guard, witnessing firsthand the swimming creatures living inside a human body, how could she not be terrified?

No wonder Shi Yuanyuan was so fearless after being captured by her; she probably infected quite a few people in the mansion with the parasites. It's just a mystery how she managed to control them.

Xiang Wan dared not linger any longer. After tying up Shi Yuanyuan, she left the room and instructed the people left behind to keep the charcoal brazier burning all night to prevent Shi Yuanyuan from causing trouble after waking up.

As for Shi Liefeng, Xiang Wan also instructed the servants to keep the courtyard brightly lit, just in case. She dared not stay alone, so she ran to Xuan Yuanlan's room and wouldn't leave no matter how much she was told to.

"Why are you so stubborn, girl? Your master needs to rest, what are you doing here?"

Just moments ago, Xuan Yuanlan was full of energy, eager to study the things she had taken from Shi Liefeng. But when she saw Xiang Wan approaching, she started lying through her teeth, showing no remorse whatsoever as a teacher.

But Xiang Wan needs her help now, so she can't expose her.

“Master, I know you need to conserve your energy to study medicine. However, your disciple has discovered something interesting and has come to ask you about it.”

"Oh? Tell me about it." Xuan Yuanlan perked up and was no longer in a hurry to push Xiang Wan out.

"Look, Shi Yuanyuan is just a woman, and all she relies on is Shi Liefeng. But we've already crippled Shi Liefeng. Master, what do you think Shi Yuanyuan will do next?"

"That's it?"

"Furthermore, I suspect that quite a few people in the manor have already been controlled by these two."

"How can we control it?"

"This, this, is that kind of thing."

Xiang Wan couldn't bring herself to say it; the thought of it made her feel numb all over.

"Which kind? The same as the one on your father's body?"

"What?"

Xiang Wan was startled, and the stool behind her fell to the ground. Although she knew that Master Li might have fallen for the trick of the Shi siblings, whether it was poison or a life-threatening drug, she never expected it to be the kind of creature that made her hair stand on end.

"Ha, you little rascal, you really knew."