A Catholic school newcomer falls in with a clique of teen witches who wield their powers against all who dare to cross them -- be they teachers, rivals or meddlesome parents.

On her 13th birthday, Marnie learns she's a witch, discovers a secret portal, and is transported to Halloweentown — a magical place where ghosts and ghouls, witches and werewolves live apart from the human world. But she soon finds herself battling wicked warlocks, evil curses, and endless surprises.