Employed as a night-nurse for the ailing Mr Cunningham, young carer, Emma, arrives at a rambling, isolated house in the English countryside for her first shift, expecting an uneventful evening ahead. But stepping inside the house, and left alone with her silent, new patient, Emma is unable to shake a growing sense of dread. As the night draws on, unease blossoms into terror as signs of a supernatural presence grow increasingly harder to ignore.