In a decaying mansion on the outskirts of London, middle-aged spinster Maura Prince (Patricia Neal) lives a life of drudgery caring for her blind and domineering mother (Pamela Brown). Into their dysfunctional lives, a handsome stranger appears, riding on a motorbike and looking for work as a handyman. Young Billy Jarvis (Nicholas Clay) soon makes himself indispensable around the house, but his angelic features mask dysfunctions that threaten both women's lives.