Sir Hector Benbow invites Cherry, a pretty shop assistant, to dine. Arriving home, he finds not only Cherry but Mrs Frush, to whom he has rented Thark, his neice's Norfolk house. Mrs Frush complains Thark is haunted. To distract Lady Benbow's attention from Cherry, he suggests everyone go to Thark, which lives up to its spinechilling reputation. A wild night, sinister butler and plethora of romantic mix-ups add to the lively proceedings.