Unrivaled horror movie legend Boris Karloff (Frankenstein, the Mummy) stars in the pulse-pounding crime thriller Night Key. Mild mannered David Mallory (Karloff) is an eccentric inventor who spent 20 years of his life perfecting a security system only to find himself taken advantage of once again by a former partner and his lawyer. Seeking revenge so that he can provide for his daughter (Jean Rogers), Mallory soon finds himself kidnapped by a gang of burglars and forced to help them commit robberies. Filled with twists and turns, this unique role showcases the versatility of Boris Karloff and cements his status as a true giant of American cinema.