This drama tells the suspense story of a young female detective, Chi Xia, who applied to be transferred to the Dongzhou City task force because she devoted herself to investigating the death of her adoptive parents. She gradually met, got to know and cherished each other with the team leader Luo Xun. The two of them each showed their strengths and efficiently solved a series of mysterious cases through excellent criminal psychology theory and meticulous observation. Finally, they successfully attacked the criminal group behind the scenes and restored the innocence of Dongzhou City.