Sam's ready to trick-or-treat. He has an empty bag, the perfect costume, and a laugh to scare his friends. But when he answers the door for trick-or-treaters who turn out to be real monsters, Sam's in for the fight of his life. A vampire, witch, zombie, werewolf, and ghost kidnap Sam and take him to a dark realm between life and death. There he discovers he's the key component of a spell to unleash evil on Earth. If Sam doesn't want to be a human...