In the winter of 1975, technician Han Xuanran and female educated youth Feng Shiqing exchanged bodies due to a bizarre car accident. When he returned to the educated youth center as her, he found "his" body lying in the morgue, and everyone identified "Feng Shiqing" as the murderer. In order to regain his identity and clear his grievances, he must hide secrets during the investigation, but step by step he becomes involved in deeper political conspiracies and serial murders, until he discovers the terrifying truth behind the exchange - this is not an accident at all.
