Vincent Price - Lionel Grisbane, Christopher Lee - Corrigan, Peter Cushing - Sebastian Grisbane, Desi Arnaz
A young american writer goes for a bet of $ 20,000 on a remote welsh estate. Bet to write a novel in twenty-four hours. A determined young man, however, soon discovers that the castle, though empty, has a few somewhat specific population...the Young american author Kenneth Magee (Desi Arnaz Jr.), currently living in England, bet $ 20, 000, that for twenty-four hours to write a tempestuous and thrilling novel. To make him better written, embarks on a secluded and deserted welsh manor. After his arrival, however, Kenneth discovers that to lock someone dwells – Lord Grisbane and his daughter, Victoria (Sheila Keith), who is about manor care on their own. During a stormy night the castle comes more and more people, who, as he soon revealed, are all members of the family Grisbanů. Just this night are gathered here, to unravel the terrible secrets. Horrified, the writer soon finds himself entangled in the middle of a mysterious castle experiencing one of the stories Agatha Christie.
