Import zonder Nederlandstalige ondertiteling.

As Peggy (Judy Geeson) recovers from a nervous breakdown, she is attacked by an unseen, one-armed assailant. Shaken by the attack, Peggy and her new husband Robert (Ralph Bates) move to the country school where Robert teaches – a school they discover is completely deserted save for the headmaster (Peter Cushing) and his wife (Joan Collins).

Despite moving away from London to the isolated school grounds, Peggy is once again assaulted by the one-armed attacker. When Robert is sent back to London on behalf of the headmaster, Peggy is left alone to face her fears…

Directed, produced, and co-written by Hammer legend Jimmy Sangster, this taut and tense psychological thriller proved to be the final entry in Hammer’s line of “mini-Hitchcocks”.