像优美的音乐缓缓流淌，多么美丽的夜晚。然而，伴随着无尽的黑夜，只有人类无尽的忏悔和自责被独自锁在被改造成房子的地方 Aston (Robert Shaw), a quiet, reserved man, lives alone in a top-floor cluttered room of a small abandoned house in a poor London district. He befriends and takes in Mac Davies (Donald Pleasence), an old derelict who has been fired from a menial job in a café. In time Aston offers him a job as caretaker of the house. Aston's brother, Mick (Alan Bates) - a taunting, quasi-sadist...