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Upon wedding the lovely Sybilla (Barbara Bel Geddes), lifelong bachelor Horace Meade (Alexander Scourby) has second thoughts and asks for a divorce. When she refuses to give him one, he begins making entries in his diary, apparently plotting Sybilla's murder. In truth, he is only fantasizing, but his fantasies take a sinister turn when Sybilla tells him that she has turned the diary over to her lawyer with instructions that it be read in the event of her death -- a tragedy that Horace will now have to toil night and day to prevent!