After his life falls apart, Leo Gable inherits his aunt's creepy Victorian home in small-town Millbury. Strange things begin immediately: footsteps in the dark, a hidden basement door that shouldn't exist, and his aunt's porcelain cat collection that moves on its own. Something ancient lives beneath the house—a lonely entity that feeds on human despair and invites its victims to "smile in the dark" with her forever. Leo must unravel the town's dark history before he and his friend Maggie become the next souls trapped in the darkness.