Joe Sante [Steve Cochran] is a small-time crook who starts as a bookie's runner and a minor drug pusher. Through ruthless efficiency and hard-nosed ambition, he climbs the ranks of the city’s organized crime scene, eventually becoming one of its central czars. Yet his ascent invites danger, and betrayal from fellow criminals who crave his wealth and power seals his fate.
His first significant assignment has him delivering narcotics to individual customers at their homes. The Blonde [Yvette Vickers], a nightclub temptress, tries to pay for her dope with something other than cash, but Joe declines, fixed on Teresa Porter [Lita Milan], a neighborhood girl who represents something purer to him. Even as his power grows, he looks down on the “party girls” who attend Syndicate gatherings.
Joe’s troubles land him a one-year sentence for drug dealing, his first offense. When he’s released, Syndicate men meet him at the prison gates, impressed by his quiet, steady resolve behind bars, and offer him a senior slot if he proves his loyalty by carrying out a murder contract. During a Welcome Home Party thrown by his mother, Joe slips out long enough to complete the hit and returns as planned, though Teresa’s younger brother Ernie [John Brinkley] harbors suspicions about what really happened.
With a careful, strategic approach, Joe amasses a small fortune through labor union racketeering and rises to No. 2 in the Syndicate, with his neighborhood pal Black Frankie Udino [Robert Strauss] as his right hand. To keep Teresa content and to quiet Ernie, he places them both on the payroll. But Ernie spirals into narcotics and, one night, bursts in high, waving a gun and threatening blackmail. Partly to protect Teresa and partly out of personal resolve, Joe shoots Ernie dead. Teresa is questioned but cannot bring herself to implicate him, and she becomes Joe’s mistress; in one of his few decent acts, Joe remains loyal to her.
Syndicate boss Paul Moran [Frank Gerstle] grows wary of Joe’s expanding power and orders Black Frankie to take him out. Frankie tips Joe off, and Joe ambush-kills Moran in the lobby of his apartment building. Joe ascends to the top, and Black Frankie’s influence continues to grow as well.
Yet notoriety attracts the glare of the U.S. Senate Crime Commission. Joe repeatedly invokes the Fifth Amendment, while Frankie offers a desperate plan for safe passage—passports and a freighter out of the country. En route, their taxi comes under fire. Joe shields Teresa, slips into an Army surplus storage yard for cover among armored tanks, and fights back, killing the two would-be pursuers.
Returning to the apartment, wounded, Frankie coldly reveals there was never a getaway ship, and shoots Joe dead before Teresa (whom he allows to live). Joe is carried away by the same body-disposal unit he once used to rid himself of corpses. His dying words imply a dark reckoning: someday Black Frankie will meet the same fate.
Set against a grim, noir-saturated backdrop, the film unfolds with a relentless pace as a man’s ruthless ascent, his brutal acts of loyalty, and his ultimate fall illustrate how crime consumes its own.
