When his partner is killed, tough Irish detective Eddie Ryan vows to avenge the death, whatever the cost. As he begins unraveling clues, his behavior becomes so outrageous that he's obliged to turn in his badge, but the experience only emboldens him. Ryan eventually learns that his partner was caught up in a Puerto Rican gun-running scheme masterminded by a crook named Sweet Willie, who wants to foment revolutionary war.

Robert Duvall
as Eddie Ryan

Verna Bloom
as Maureen

Henry Darrow
as Sweet William

Eddie Egan
as Scanlon

Felipe Luciano
as Ruben Garcia

Tina Cristiani
as Mrs. Caputo

Marina Durell
as Rita Garcia

Chico Martínez
as Frankie Diaz

Jose Duvall
as Ferrer

Luis Ávalos
as Chico