Olga Drent never realized that the scar on her cheek was to mar her happiness, as well as her beauty, until she meets Stanley Sherwood and gives her love unsought. The arrival of her school chum, Marian Ormsby, with her fresh, clear beauty, causes Olga to curse the fatal scar, which she blames for Stanley’s choosing Marian for his wife. Jealousy of the most fiendish kind prompts her, in the dark hours of night, to mutilate her rival. She steals to her father’s (Dr. Drent) laboratory, and procuring chloroform she goes to Marian’s bedside and after her victim is unconscious, cuts her fair check with a nail file. Her jealous passion subdued, remorse follows. And when morning breaks, the discovery that she has unintentionally severed an artery in Marian’s face, drives her frantic. Dr. Drent and the hurriedly-called specialist decide transfusion alone can save Marian’s life. Dr. Drent gladly offers his blood, but the doctor decides his heart will not permit it. Olga sees her chance for atonement and offers herself. Despite her father’s remonstrance, the operation takes place, and both girls slowly return from the valley of the shadows. June sees the quiet wedding of Sherwood and Marian, and the forgiven Olga presses their hands and buries her face in the bride’s roses.