Parks and Donnell buy a decaying New England hotel from scientist Karloff in hopes of turning it into a tourist attraction, unaware of Karloff's experimenting in the building's basement lab. When Parks discovers a few corpses in the cellar, "miscalculations" in Karloff's attempts to create
a race of supermen, he calls upon Lorre, the village's law enforcement official and
financial powerhouse, to see that the fiend is taken into custody. Lorre, however, sees Karloff's experiments as a possible means of monetary gain and personal physical strength, so he refuses to arrest the crazed
doctor. When two of the hotel's long-time inhabitants are discovered to be ki...