Svengoolie hosts a movie where Karloff and Lugosi are at odds in a strange fortress. The story involves betrayal, a cult and a endangered young couple. Sven gets up to mischief as he provides us with movie information and goofy skits to keep us monster kids entertained.

End Credits Tagline: 'We can keep Sven happy for hours just by getting him to chase a flash of light across the studio floor'.