Nightclub singer Larry Todd breaks off his romance with a beautiful showgirl when he realizes she*s the girlfriend of a murderously jealous gangster. While on the run, Larry mistakenly believes he kills one of the mobsters and is helped to escape police by heiress Mary Carol, who **uggles Larry and partner Myron to Cuba. Mary has inherited a haunted castle on an isolated island and, ignoring ominous warnings and threats, decides to take possession. While there, the trio hunt for a hidden treasure and encounter a ghost, a zombie, and a mysterious killer.