It tells the story of a former out of date movie star in old Shanghai who gets involved in a confusing murder case. In order to prove her innocence, she joins hands with her personal female assistant to find out the truth. This drama focuses on the two girls with extremely contrasting personalities and identities. Hu Xiaodie was originally an over-packaged commercial female star; Hua Xiaoqing is a young independent woman, who had returned from abroad to her family’s downfall. In order to clear the suspicions on them, they begin to learn the knowledge of investigation and reasoning skills, and eventually grow to become the nemesis of crime, with the help of the Central Police Station.