After Bangkok and New York, Chinatown master detectives Tang Ren (Wang Baoqiang) and Qin Feng (Liu Haoran) are heading to Tokyo to solve a mysterious murder case. Joining them are Thai detective Tony (Tony Jaa) and Japanese policeman Noda Hiroshi (Tsumabuki Satoshi) as they attempt to outwit Q, the top ranked mastermind on Crimastr.