Former gangster Ho, after being released from prison, infiltrates a gang of counterfeiters with the help of his brother Kit, a police officer. When the life of the gang’s leader Lung is in danger, the brothers smuggle him to New York under the protection of their friend and twin brother Mark Gore — Ken. To save Lung, Ken fearlessly fights the hitmen sent by the mafia. Following his sense of duty, he leaves his business behind and heads to Hong Kong to deal with the gangsters on the spot with his friends.