Po, Ho, Tung and Mantis are hitmen working for one of the local Triads. They'd like to retire but their boss Prince keeps on using their skills. They execute their victims by strictly using swords, never guns. Now, when Mantis is tortured by Fai, a member of a rival gang, his friend Po comes to help him and humiliates Fai in front of his own men. Prince tells the four hitmen then that the only way to prevent a bloody gang war now is to leave the country for a while or to promptly kill Fai. The four friends decide to stay in Hong Kong in order to settle this matter