Jack went up the beanstalk, and brought down Hell.

Desiring control of the kingdom, evil wizard Pendragon devises a cunning machination to usurp the throne. By abducting and forcing Princess Elaine to marry him, Pendragon will coerce the king into abdicating his power. When Pendragon sends a giant to kidnap Elaine, a simple farmer named Jack witnesses the abduction, and bravely slays the beast. Undeterred, Pendragon has more power and creatures at his disposal.