Unriddle

While tracking down Zhang Yuze, Xiao Man finds photographs of Andrew, Zhirong and Guosheng in an old building. The photos of Zhirong and Guosheng have X's over their faces and Xiao Man realizes that Andrew is the next victim.

Xiao Man chases Andrew to the rooftop. Andrew shoots at Xiao Man but Dewei pushes her out of the way getting hit with the bullet meant for her while shooting Andrew.

Xiao Man goes to talk with Liu Zhiming. As she is leaving, she's attacked from behind and blacks out, waking up later in an abandoned building, handcuffed to a gate.

Zheng Yi and Xiao Man find a very sick and injured Zhang Yuze. At the hospital, the doctor says that he's been ill for a very long time--far too ill to be able to kill Andrew, Zhirong and Guosheng.

A rich Indonesian girl disappears and the police have been asked to look for her. Officer Hu Xiaoman go in search for her and discover a human trafficking ring as well. The ring-leader Shan Fan and his partner Lin Zhengyi escape, but Xiaoman recognizes Zhengyi's back view.

Xiaoman catches Zhengyi but Yuze interferes. It turns out that Zhengyi is Yuze's mole. In the plan, something goes awry, and someone dies because of Zhengyi. Guilt-ridden, she vows that she doesn't want to be a mole again after this.