When Hawver rents an abandoned house once owned by an eccentric doctor with a dark reputation, he doesn't expect his stay to be anything more than an escape from the summer heat. But the lingering presence of Dr. Mannering—through his haunting portrait and whispered local legends—begins to stir unease. Hawver’s nights are soon plagued by inexplicable encounters that defy the boundaries of reason and science. Is the doctor's disturbing theory about life and death more than a madman's delusion?