Legend has it that centuries ago, Saint Nicholas was in fact a murderous marauder in medieval times, who was ultimately slain by the villagers he tormented - only to swear a ghostly revenge on their descendants every December 5, the anniversary of his death. Today, the ancient story has been long forgotten and settled comfortably into folklore, until a bloody encounter with the ghoul himself forces local teen Frank to believe in Santa all over again, and save the city of Amsterdam in an all-out bloody battle against a wrathful Santa Claus and his minions.