Felix is trying to get some sleep in a graveyard, but keeps getting bothered by a ghost. He follows the ghost to the house of an old farmer, and the ghost proceeds to terrorize the old man, and when the farmer calls for help from the police, the ghost terrorizes them, too. Felix, however, suspects something fishy is going on, and with the help of the farmer's donkey, gets to the bottom of things.
Mary Carter inherits her family's ancestral home, located on a small island off Cuba, and, despite warnings and death threats, decides to take possesion of the reputedly haunted castle. She is joined by radio broadcaster Larry Lawrence who, believing he has killed a mob gunsel, flees New York with his butler, Alex. Once on the island the threesome enter the eerie castle and after viewing the ghost of one of Mary's ancestors and fighting off a menacing zombie, they find the key to the castle's treasure but are interrupted by an all-too-human foe.