A Mafia boss is enraged when he is suspected of smuggling a heroin shipment into San Francisco. He dispatches his nephew, a hotshot Anglo-Sicilian lawyer, to identify the real culprit. The lawyer also enlists the aid of his best friend, a grand prix driver with an adventurous streak.

Maurice Poitier, a disbarred lawyer, is dumped in prison. In prison, he learns of a plan of robbery worth millions from a dying inmate: once released, will begin to put together a group of bandits to pull this off. But not everything goes as hoped.

Jeff sets out to murder each one of the five outlaws who robbed, raped and killed his poor sister. He lays a fragment of her poncho on each of his victims' dead bodies as a mark of his revenge in a gripping, exciting tale.