When Dr Frankenstein decides to retire from the monster-making business, he calls an international roster of monsters to a creepy convention to elect his successor. Everyone is there including Dracula, The Werewolf, The Creature, Dr Jekyll & Mr Hyde and many more. But Frankenstein's title is not all that is at stake. The famous doctor has also discovered the secret of total destruction that must not fall into the wrong hands!
In a mountainous region of Japan, Lord Arakawa kidnaps the men of nearby villages to use as slave labor, producing gunpowder from his sulfur pits. A band of young boys decide to rescue their enslaved fathers on their own.
A one-handed madman (he lost the hand while escaping a hanging) uses various detachable devices as murder weapons to gain revenge on those he believes have wronged him.
A group of biology students head to the Florida Everglades for a holiday, but instead of fun in the sun, they run into trouble with a mutated, bloodthirsty, and quite deadly jellyfish-man-monster.
A group of student archaeologists venture into the Florida Everglades to look for fossils, but come across an area cursed by a Native American witch doctor.
An unhappy middle-aged banker agrees to a procedure that will fake his death and give him a completely new look and identity; one that comes with its own price.
The tyrannical Lord Danjo Mikoshiba covets the rich, fertile lands surrounding Lake Yakumo. During a memorial ceremony for the late Chigusa lord, Mikoshiba launches an attack, overthrowing the honorable Lord Juro. Just when all seems lost, Daimajin rises from Lake Yakumo to settle a score of his own.
Herman discovers he's the new lord of Munster Hall in England. The family sails to Britain, where they receive a tepid welcome from Lady Effigy and Freddie Munster, who throws tantrums because he wasn't named Lord Munster. An on-board romance had blossomed between Marilyn and Roger, but on land Marilyn discovers Roger's family holds a longstanding grudge against the Munsters.
Young nobleman Mino lives with his mother and Marta, the housekeeper, in an old, decaying castle. He is infantile and morbidly attached to the weird duo; his only hobby is taxidermy. Laura, Mino's fiancee, is met with jealousy and hatred by the two women, and decides to leave the castle; but Marta sabotages her car brakes and she is killed. Mino takes her body back to the castle. Meanwhile, his mother is violently arguing with Marta, who throws her down the stairs and repeatedly bashes her head on the floor. The distraught Mino descends into madness: he picks up a stripper at a nightclub and brings her home, then strangles her while having sex next to Laura's dead body. He does the same with a prostitute. Marta discovers these murders and offers to help dispose of bodies. A year later, Daniela (Laura's twin sister) arrives at the castle...
Luther Heggs, a typesetter for the town newspaper, pitches an idea for a story about a local haunted house where a famous murder/suicide occurred 20 years earlier. After the editor assigns Luther to spend one night alone in the mansion, Heggs has a number of supernatural encounters and writes a front page story that makes him a hometown hero...until the nephew of the deceased sues him for libel.
A young woman is psychologically manipulated and tortured by her treacherous husband while her lost fiancé is missing, presumed dead, and only the ghosts of the castle can tell the tale.
A nuclear explosion in the far north unleashes Gamera, the legendary flying turtle, from his sleep under the ice. In his search for energy, Gamera wreaks havoc over the entire world, and it's up to the scientists, assisted by a young boy with a strange sympathic link to the monster, to put a stop to Gamera's rampage.