Even for the Seventies I found this quite a disturbing movie. Michael Gough plays a sadistic father and husband to Jane and Edith, and his son Rupert is not much better really. Anyway the two females hatch a plan to kill Gough whist he's away for the weekend. I won't spoil the ending but this is a very underrated British film filled with an impending sense of doom throughout. In fact there's hardly a smile in the entire film.