London – the long, hard winter. As striking miners switch off the power across Britain, rolling electrical blackouts plunge the country into darkness. Val, a young nurse on her first day of duty is forced to work the night shift. When most of the patients & staff are evacuated to another hospital across the town, she finds herself in a building enveloped by a sinister darkness. Within these walls lies a deadly secret and a terrifying presence. Now Val must face her deepest fears to confront the malevolent force intent on destroying them all.