It's been twenty years since Western State Hospital was closed down and the last of its inmates reintegrated into society. Francis Petrel was barely out of his teens when his family committed him to the asylum, after his erratic behavior culminated in a terrifying outburst. Now middle-aged, he leads an aimless, solitary life housed in a cheap apartment, periodically tended to by his sisters, and perpetually medicated to quiet the chorus of voices in his head. But a reunion on the grounds of the shuttered institution stirs something deep in Francis's troubled mind: dark memories he thought he had laid to rest, about the grisly events that led to Western State Hospital's demise.