With the outbreak of city gang wars between Gunner Gallagher and Lefty Schroeder, criminal lawyer John Phelan, feared in the underworld, brings temporary peace, while district attorney Franklin Ames investigates. Nada Winthrop, daughter of a powerful capitalist, is sought by both men. Though Nada loves John, she disapproves of his criminal practice; and when he frees Gunner Gallagher on bail, she announces her engagement to Ames. When Ames discovers that her father is the secret brain of the underworld activities and Winthrop has him killed, John takes the district attorneyship to avenge his friend. Snuggles, Gunner's girl, threatens to inform on Winthrop unless John releases Gunner, and he concedes; John is about to resign when Snuggles, rejected by her man, confesses.