At a gathering of legendary monsters, Baron Boris von Frankenstein announces his retirement and seeks a successor. The attendees include iconic creatures such as Dracula, the Werewolf, the Creature, Dr. Jekyll and Mr. Hyde, and others. However, the true stakes are not just about the title, but also the doctor's discovery of a powerful secret that must be kept out of the wrong hands.
Mad Monster Party?
On a mysterious island, the leader of a monstrous organization announces his impending departure and shares a secret formula for ultimate devastation, but his plans are foiled when his monstrous associates attempt to snatch the formula and murder his nephew.