Sammy "the Bull" Gravano, a vicious hit man with 19 murders to his name, runs a string of lucrative businesses and becomes the loyal and extremely dangerous underboss of New York's biggest crime family.

Carmine "the Snake" Persico, a master of deceit, commits one of the biggest murders in Mafia history; while behind bars he rules a crime family, conducts three wars and orders murders.

The Mob welcomes Anthony "Gaspipe" Casso, a brutal thug with a love of violence, with open arms; he makes millions for them, and for himself, but he grows severely paranoid.