A young painter resigned from his teaching position at the Academy of Fine Arts and landed at the Haicheng Public Security Bureau with a mystery.Seven years ago, when he was still a student sketching on the street, a stranger took a photo of a child and asked him to draw the child's adult appearance. However, this painting led to the death of Haicheng detective Lei Yifei, who was exposed as an undercover agent..Five years later, his guilt became heavier. In order to find out the truth, he accepted the invitation of Director Zhang of the Public Security Bureau and became a portraitist of the Criminal Police Team.