Siblings Mimi and Luke unwittingly resurrect an ancient alien overlord. Using a magical amulet, they force the monster to obey their childish whims, and accidentally attract a rogues’ gallery of intergalactic assassins to small-town suburbia.
Five young mutants, just discovering their abilities while held in a secret facility against their will, fight to escape their past sins and save themselves.
The Cromwell clan live in the real world, except for their grandmother who lives in Halloweentown, a place where monsters go to escape reality. But now the son of the Cromwells' old enemy Kalabar has a plan to use the grandmother's book to turn Halloweentown into a grey dreary version of the real world, while transform the denizens of the real world into monsters.
On Halloween, a group of friends encounter an "extreme" haunted house that promises to feed on their darkest fears. The night turns deadly as they come to the horrifying realization that some nightmares are real.