Identical twins in appearance only, sisters Helen and Marion Dean have totally different temperaments: Marion possesses a self-sacrificing character, while Helen is vain and heartless. When Marion, a wonderful singer, is crippled by a car accident just before she is to open at the grand opera, the manager of the opera conceives of the idea of presenting Helen on stage while Marion sings the music behind the scenes. A young millionaire, Monte Bruce, watching from the audience, is captivated by Helen and the two are married. Marion accompanies them on their honeymoon cruise, and when an explosion blinds Bruce, Helen begins to flirt with fellow passenger Jack Mason, leaving her crippled sister to take her place at Bruce's side. Helen's scheme goes awry when Bruce recovers his sight but keeps his recovery secret, thus discovering Helen's duplicity.