The film tells the story of Chen Baili's father, the director of the Shanghai Police Department, who was bizarrely murdered for investigating the theft of state secrets. In order to find out the truth, Cha Li and his assistant Ai Li returned to Shanghai from the United States for investigation.

　　金牌导演杜琪峰呕心沥血之作，演员阵容强大，动作场面刺激，剧情曲折悬疑。