The relatives of a rich old woman unsuccessfully try to have her declared insane, so they can divide up her money. To show them that there are no hard feelings, she invites them to her estate for the weekend so she can decide to whom she actually will leave her money when she dies. Soon, however, family members begin disappearing. Written by
Murders occur with clocklike regularity...clues are stolen...bodies disappear...while seven frightened people hunt the hidden fortune of a vengeful woman!
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Did You Know?
At c.25 minutes the photographer, upon entering the crowded room says "All right, everybody, hold it please!" He then proceeds to take a photograph that centres upon an empty armchair, largely ignoring the assembled cast. See more
[regarding the invitation's instructions to arrive precisely at midnight
Midnight? Now why should she insist on midnight?
She probably saw "The Cat and the Canary".
References The Cat and the Canary