Radio personality Lawrence L. Lawrence must flee New York to avoid being mistakenly arrested for murder. He and his manservant Alex book passage on a Cuba-bound liner, where they meet lovely heiress Mary Carter. She is heading to Cuba to take charge of her ancestral mansion, despite warnings from several sinister characters that to enter this "haunted" house will mean certain death. Appointing himself Mary's protector, Lawrence investigates the mansion on his own, thereby crossing the path of a zombie and an apparently genuine ghost. He also meets the twin brother of the man he's accused of killing who seems the most likely suspect when Mary nearly comes to harm.