When Hong Kong police negotiator Lee Chung-chi (Louis Koo) was informed about the sudden disappearance of his 16-year-old daughter, Lee Wing-chi (Hanna Chan), during her trip to Pattaya, he decides to travel to Thailand to search for her daughter’s whereabouts. There, He receives assistance from local Chinese detective, Chui Kit (Wu Yue), and his colleague, Tak (Tony Jaa), and also encounters the American gangster, Sacha (Chris Collins).