The silence of the white-walled institution was punctured by the violent screams of one of the patients. The sound echoed deeper into the establishment, chilling everyone who heard it to the bone. Other patients lay in their beds, tears streaming down their faces as they listened to the tortured voice. Night shift guards stood at their posts; faces set in unreadable masks as they struggled to block the sound out.

The voice seemed to go on for eternity before climaxing in a horrible scream that dwarfed all those that came before it. Patients and guards alike sighed in relief. Tonight's episode had finished but experience told them it would happen again the next night.

And the night after that.

And every night for the rest of that patient's life.