Ship engineer Jim Taggert is rescued from a torpedoed tramp steamer by Joe Morgan, an American gangster that found New York too hot for him, and has become a fisherman operating from an out-of-the-way island off of the coast of South America. Morgan makes his headquarters at the Halfway House run by the parents of Maria Styx as a bar and dance resort catering to the planters and traders of the island. Taggert finds himself practically a prisoner along with a group of American girls acting as entertainers at the resort. Taggert shadows Morgan in his activities in a remote cove and finds that Morgan is supplying German U-boat commanders with torpedoes, but does not know that Morgan has rigged the torpedoes with clock devices that explode when at sea and sinks the U-boats.
John Litel
as James Xavier 'Jim' Taggart
Alan Baxter
as Joe Morgan
Eric Blore
as Spike, Morgan's Aide
Georges Metaxa
as Nazi Agent Anton Kroll
George Flaherty
as David Cavanaugh
Rafael Alcayde
as Felipo
Fifi D'Orsay
as Maria Styx
Iris Adrian
as Dorothy
Jacqueline Dalya
as Judy Pierson
Anna Demetrio
as Angela Styx
Luis Alberni
as Mr. Styx
Lucien Prival
as Capt. Mueller - German Submarine
