Heroic Duo (Chinese: 雙雄) is a 2003 Hong Kong crime action film directed and produced by Benny Chan.

The main action begins when Inspector Li is brought in to investigate a cop who has committed a crime.

The strange circumstances lead Li to Jack Lai, who is a master hypnotist and also in jail for manslaughter after taking the rap for a murder his wife committed under duress.

Although they fail to catch the criminal, it is clear from the evidence in the apartment that there is a plot to steal two Egyptian diamonds worth millions from an American named Barry Lykin.

After reaching the parking lot one Ocean's men engages in a shootout with police killing several officers and Lykin who was being escorted to his car.

His girlfriend, Brenda, still hopelessly in love with him, helps him to evade recapture to pursue Jack and the criminal mastermind Ocean in order to recover the diamonds.