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...