Episode 5 recap: Lin Mengchen followed Ye Xiaosheng and joined the Blood Sacrifice Hall.

Lin Mengchen made a move to test Ye Xiaosheng and was choked by him, warning her not to approach his sister. Otherwise, he would kill her. Lin Mengchen quickly explained that she didn't want to make enemies and was purely curious about him. Seeing people coming and going around, Ye Xiaosheng decided to leave. Lin Mengchen asked Qi Zeyu to help investigate the Oriental person who died at the ball that day. She learned that the person had offended many people by snatching many antiques and someone must have hired a killer to get rid of him. As for the identity of the killer, Qi Zeyu couldn't find any information.

After thanking Qi Zeyu, Lin Mengchen was about to leave. Qi Zeyu instinctively held her back and noticed the wound on her arm. He carefully applied medicine to her. Lin Mengchen had been thinking about Ye Xiaosheng's pursuit of Cao Fang that night and was lost in thought. Qi Zeyu called her a few times before she snapped out of it. Qi Zeyu, being a doctor, deduced from Lin Mengchen's injuries that she had been practicing martial arts for a long time and that the injuries were not self-inflicted. However, he was willing to keep it a secret and even hide it from Ye Xiaosheng.

Qi Zeyu knew that Lin Mengchen wanted to go out into the world after resolving everything, so he specially sent a picture album to her home. Although Ye Xiaosheng sent the person away, he felt a sense of crisis when he learned that Lin Mengchen wanted to leave. He became anxious and decided to speed up his departure from the Blood Sacrifice Hall. Lin Mengchen recognized Ye Xiaosheng's secret signal and followed him to the dyeing workshop, successfully joining the Blood Sacrifice Hall and becoming a new generation of assassins.