Almost the whole staff of a tax consultant office are slain by a team of professional killers, with only Paul Damone escaping. He didn't know that his partner was a former money launderer for gangster Louis Sarazin and had to testify as chief witness against him. Paul's brother Johnny, the best bounty tracker in 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...