Almost the whole staff of a tax consultant office are slain by a team of professional killers, only Paul Damone can escape. He didn't know that his partner used to wash gangster Louis Sarazin's money and had to testify as chief witness against him. Paul's brother Johnny, best bounty tracker of Boston, visits Paul to protect him, but can't prevent that he and his pregnant wife are targeted by the same team. Now Johnny's out for revenge...

Sean and Billie are undercover cops and martial arts masters. Investigating the death of a cop, they uncover a deadly ring of murder and corruption at a glitzy nightclub, where the rich are entertained by seductive women and protected by martial arts experts. Billie goes undercover to infiltrate the crime ring, leading to an explosive finale.