Synopsis: In Castro's Cuba, a ragtag group of loyalists hire an American gangster to smuggle out the nation's treasury. Their boat cruise becomes a nightmare when an undersea monster begins picking them off one by one. This comedy of errors has an intriguing cast of weird characters. Secret agent Sparks Moran, played by (future) Academy Award winning screenwriter Robert Towne (Chinatown, Shampoo), is billed as Edward Wain. The screenplay is the product of the prolific Charles B. Griffith who also wrote Corman's Little Shop of Horrors and many others.