 In this sequel, Ho (Ti Lung) initially refuses to go undercover to bust the gang he used to work for in exchange for his release from prison. He only accepts after his little brother, the policeman Kit (Leslie Cheung) accepts the assignment. Meanwhile in New York Ken Gor (Chow Yun-Fat), the twin brother of Mark Gor from the 1st movie, shelters the boss of the gang, who has had to flee after it is taken over by a more aggressive leadership.