Less than normal behaviour is only to be expected in a psychiatric hospital. But at The Manor, the strange behaviour appears to come from the staff. Doctor Helen Ross, after ending an affair with a fellow doctor, decides to make a career move to a hospital far away from London. She soon realises, however, that all is not as it should be at the hospital. Patients being removed from their beds in the dead of night and the odd behaviour of the staff prompt her to investigate. What secrets does the hospital hold? And why are the staff so obedient to the enigmatic Professor Kirkby and his strange rules?