After returning from studying abroad, An Qiao (played by Wan Tong) joined the White Bird Newspaper, where Qin Nan (played by Zheng Peilin) and Chen Beibei (played by Zhou Jiayu) worked. Lin Han (played by Wan Peixin) is the son of Lin Xun, a philanthropist. There have been five confusing murders in the city. Coincidentally, the victims are all inextricably related to Lin Xun. After careful investigation, it was discovered that all of this pointed to the murder of the undercover policeman Ding Jian'an twenty years ago, and Ding Jian'an's daughter was An Qiao. At this juncture, An Qiao disappeared. It turned out that An Qiao returned to China this time to investigate the truth behind the murder of his father. The police put their suspicion on An Qiao, but both Qin Nan and Chen Beibei firmly believed that the murderer was someone else. What is An Qiao's real purpose? Can her revenge plan come true?