Moreau, a young blind musician, is greatly loved by Marie, a servant in the Petite Pension, where he resides. She learns through a letter that Moreau has lost the income derived from a small inheritance, but keeps him in ignorance of his misfortune by entreating his attorney to send Moreau her small savings. Eloise De Montjeu, an opera singer of the lower class, introduces herself to Moreau, upon receiving the vocal score for a new production which she is unable to understand. Later, through his skillful training, she secures an engagement. Moreau has grown to love her, while she apparently returns his love, finding him amusing. Marie’s hands, owing to the work she has been forced to perform, have become coarse and rough. Moreau indifferently tells her that he abhors coarse hands, little knowing the deep sorrow he has brought to one who truly loved him. Eloise, upon meeting an old admirer, mocks Moreau’s love. When in despair he calls to plead with her, she takes the revolver with which he intended taking his life, removes the shells, and laughs at him. Her laughs and jeers craze Moreau, who loses his reason. He seizes a chair and starts to strike but falls to the floor himself. Upon regaining his feet he discovers that he has regained his sight. Marie, hearing the struggle, comes to the door of Eloise’s room. Moreau looks from Eloise to Marie and finally takes Marie in his arms and denounces Eloise.