Young couple gets stranded on a stormy night in a haunted house. They learn of a family tragedy revolving around a hidden treasure and have to fight off the mad ghost of Uncle Ezra.; Felix Halt, assistant to renowned scientist Sarbo, kills his employer by making him suffocate in an overheated hothouse. Halt wants to get his hand on a new super-seed which takes root anywhere and is worth a fortune. Before his death Sarbo managed to plant the seed in Halt’s body – who is now overgrown by wild plant life.; In Peter Worley’s wax museum a statue of Jack the Ripper comes alive. It is, however, the ghost of Worley’s partner Frank Allen who comes for revenge.; Scientist Emil Zarko and his colleagues Vincent and George set out to look for a place in the African jungle from where pure evil emanates. They find a medieval castle, complete with a strange housekeeper and a cellar full of gold and diamonds. Zarko wants to explore the place, his friends plan to rob it. While Zarko is stabbed to death, the other two learn the gruesome secret of the castle.