Plot synopsis: A remake of Frank Capra's Submarine (1928), Devil's Playground is a snappy Columbia "B plus" picture starring Richard Dix and Chester Morris. Submarine officers Dorgan (Dix) and Mason (Morris) battle on land for the affections of dance-hall girl Carmen (Dolores del Rio). She marries Dorgan but makes a play for Mason when her husband is on duty. The romantic rivalry is forgotten when Dorgan must rescue Mason and his crew from a sunken sub.