After seven years away from her hometown, Huang Juncan, a beautiful agent from the Investigation Support Team of the FBI's Behavioral Science Service, returned to the Longzhou City Public Security Bureau and became her good friend, the deputy of Xiao Yuan, the captain of the Criminal Police Brigade. The two have been classmates since junior high school and were admitted to the police academy together. Even though they haven't seen each other for many years, they are still new partners who work well together.
One is a brave detective who is good at crime scene investigation, eliminating evil and punishing rape; the other is a profiler who has rich practical experience and can penetrate the psychology of criminals. A pair of golden partners repeatedly solve strange cases - until one day, the bizarrely dismembered body of Huang Juncan's fiancé, who has been missing for half a year, appears in front of them...