In Los Angeles, Kline (Josh Hartnett), a young ex-cop, is struggling with the psychological trauma of his last case: tracking down and slaying a serial killer. Turning to private detective work, Kline is hired by a rich Chinese businessman to fly to Asia on a mission to find Shitao (Kimura Takuya), his missing son. Kline finds out that the king of the Hong Kong mafia, Su Dongpo (Lee Byung-hun), is also searching for Shitao, because this mysterious vagrant, who has mysterious powers to cure the sick, took in a wounded Lili, the beautiful wife of Su Dongpo. Shot on state-of-the-art HD and featuring music by Radiohead and Gustavo Santaolalla ([Babel] and [Brokeback Mountain]), this modern thriller plunges us into an exotic urban world of gritty realism and sensual beauty.