When criminal mastermind Erwin "Doc" Riedenschneider (Sam Jaffe) is released from prison after seven years, he goes to see a bookie named Cobby (Marc Lawrence) in an unnamed Midwest river city (probably Cincinnati), who arranges a meeting with Alonzo Emmerich (Louis Calhern), a lawyer. Emmerich listens to Doc's plan to steal jewelry worth half a million dollars or more. Doc needs $50,000 to hire three men—a "box man" (safecracker), a driver, and a "hooligan"—to help him pull off the caper. Emmerich agrees to provide the money and assume the responsibility for disposing of the loot.