The strange detective Xing Kai and the police superintendent Ding Luofeng have similar backgrounds but take different paths.

The strange detective Xing Kai and the police superintendent Ding Luofeng have similar backgrounds but take different paths.

The strange detective Xing Kai and the police superintendent Ding Luofeng have similar backgrounds but take different paths.

Detectives Xing Kai and Ding Luofeng, despite similar pasts and different methods, unite over a serial murder case; they join forces to catch the killer, with Kai even enlisting the help of his old enemy, psychologist Yang Zhifei.