The movie "The Suspect" tells the story of Zhang Wen, the former captain of the Iwashi City Criminal Police, who has an extraordinary memory. After his former colleague died, he was sad and resigned from the Criminal Police Team, and then was hired as a police officer at the police station. During his time as a police officer at the police station, the wealthy Xiong Bingcheng and the director of "Secret Assassination" Shi Qian were killed at home, and the police initially identified the suspect as Xiong Bingcheng's son Xiong Haoze. After Zhang Wen cleared the fog, he solved this "copycat murder case", but after the case was closed, Zhang Wen discovered that there was a case within a case hidden behind it.