Washed-up dancers Ferdie and Doris take over a stage act from a genuine voodoo queen in New Orleans. They have to pay a price though – and turn into zombies.; Demons from the "half-world" invade our "earth-plane" through a pathway opened by radiation experiments. They get trapped by their inability to cross water.; Brutal plantation owner Stefan Hootner abuses and kills his servants, thus exciting the wrath of voodoo queen Veldamma. She comes to him as beautiful Velda and tricks him into marriage.; Victor Rarlo is a sadist who loves puzzles and lets people perish in his fiendish mazes. Being challenged by a strange mystic, Rarlo travels into psychedelic mind-mazes and gets irreversibly caught in the maze of his own mind.; "When civilization began its march into the mechanical age late in the 19th century, the Paris exposition became the center of world attention..." A horror amusement ride is built, creating the world of Hades. Testing it, the park directors go mad.; "One of the most macabre tales to come from the moors of Scotland, took place fifty-six years ago..." A London police inspector doesn't believe the reports of a werewolf on the rampage on the moors and gets to be the monster's next victim.