Robert Worthing marries his sweetheart, Madeline Francis, but the wedding is ruined by his mother, who announces that because she and her parents are insane, he possesses tainted genes. Fearing that he will pass the disease on to his children, the bridegroom avoids his new wife and locks the door between their rooms. Deeply in love with Madeline, whom he is forced to love only as a sister, Robert considers suicide, but all ends well when the young man learns that he was adopted.