Simon/Jin Yan (Wallace Huo) is a psychologist who returns to China from the US after a close encounter with a serial killer.
He is a brilliant criminal psychologist, has the ability to get into the minds of even the most mysterious and violent criminals. He’s a professor at The University of Maryland and works as an analyst and advisor on the police department’s most violent or difficult cases.
With the help of his young assistant, Jenny Jian (Sandra Ma), Simon delves into the thoughts and intentions of the criminal mind. As the daughter of a veteran police investigator with a deep sense of justice, Jenny helps Simon open up emotionally as they work together to solve mysterious and violent crimes along with their two friends Li Xunran (Wang Kai), and friend Fu Ziyu (Yin Zheng).
