Charles Laughton plays Kidd, a merchant captain who cons the King of England into allowing him to take to the sea to recover a lost treasure and escort a ship back to London. An old fellow conspirator who he thought dead (John Carradine) and a mysterious young man (Randolph Scott) manage to get on board and cause problems for Kidd.

A remake of Frank Capra’s Submarine (1928). Submarine officers Dorgan (Dix) and Mason (Morris) battle on land for the affections of dance-hall girl Carmen (Dolores del Rio).