AllMovie

Unbeknownst to his sweet sister Eve (Shirley Mason), San Francisco ship-owner Harry Gibson (Earl Metcalfe) secretly operates a successful smuggling racket. Likewise ignorant of Gibson's criminal activities is Captain Matt Russell (Robert Frazer), who has been hired to commandeer Gibson's ship. Eventually, Russell is accused of being the smuggling mastermind, much to the chagrin of Eve, who has fallen in love with him. Fired from his job and disgraced in Eve's eyes, Russell is reduced to working as a common seaman, and it is in this capacity that he redeems himself by exposing the skullduggery of Gibson and his confederates. Sin Cargo was directed by Louis J. Gasnier in his standard, stolid "camera nailed to the floor" technique.