When Fisher's friends are transformed into their monstrous costumes on Halloween night, it's up to him to save the town Halloween isn't just Fisher's favorite holiday--it's his obsession. So when he's invited to join the Halloweeners, he couldn't be more thrilled. While trying to help them win the town's annual trick-or-treating competition, the Halloweeners stumble upon a mysterious cauldron at an old haunted house. After eating the irresistible candy inside it, Fisher's new friends are all transformed into the monsters of their costumes Now it's up to Fisher to help return his friends to their human forms by sunrise or else they'll be doomed to remain monsters . . . forever.