When the intelligent criminal Erwin "Doc" Riedenschneider is released from prison, he seeks a fifty thousand-dollar investment from the bookmaker Cobby to recruit a small gang of specialists for a million-dollar heist of jewels from a jewelry. Doc is introduced to the lawyer Alonzo D. Emmerich that offers to finance the whole operation and buy the gems immediately after the burglary. Doc hires the safecracker Louis Ciavelli, the driver Gus Minissi and the gunman Dix Handley to the heist. His plan works perfectly but bad luck and betrayals compromise the steps after the heist and the gangsters need to flee from the police.
A nightclub singer loses her husband in an automobile accident, and soon afterward witnesses the murders of two narcotics agents, and suffers a nervous breakdown. The police come to believe that all three murders are related, as they had suspected her husband was involved in a heroin smuggling ring, and now they think she may have been involved in it - especially after they find a large stash of heroin hidden in her apartment.