A woman claims to have killed in self-defense, until a blackmailer turns up with incriminating evidence.

Leslie Crosbie, the wife of a British rubber planter in Malay, shoots and kills Jeff Hammond, and claims that she was defending her honor. To defend Leslie, her husband Robert sends for family friend and attorney Howard Joyce, who questions Leslie's story. Howard's suspicions seem justified when Ong Chi Seng, his clerk, offers to sell the attorney a letter that Leslie wrote Hammond on the day of his death, asking him to visit her. Howard confronts Leslie with the damning evidence, forcing her to confess to Hammond's cold-blooded killing, but Leslie cleverly manipulates the attorney into agreeing to buy back the letter. The document is in the possession of Hammond's widow, who demands that Leslie personally deliver $10,000 for the letter. The transaction is completed and, without the evidence of the letter, Leslie is acquitted of her crime. It is only after she is freed and Robert plans to draw $10,000 out of his savings account in order to buy a rubber plantation in Sumatra, that he learns of the high cost of the letter and of his wife's duplicity. Confronted with the truth, Leslie confesses her guilt and her love for Hammond, and although her husband forgives her, Mrs. Hammond cannot and stabs Leslie, making her pay for Hammond's life with her own.