Harry Lang, a celebrated young portrait painter, has as his model, Milli, his mistress. Society once connected his name with Isabella, but because of his poverty she married wealthy Alfred Zanden. To allay gossip, Zanden commissions Lang to paint his wife's bust portrait, and he takes Isabella to Lang's studio himself. The artist gets Milli out of the room and Zanden leaves. While Isabella is draping a shawl around her bosom, the devil appears. He explains he is Dr. Miller, who has saved Lang's life and fortune. Later at Isabella's reception, given to announce Lang's engagement to Elsa, her friend, the devil appears again. By a ruse he convinces Lang, Isabella will appear naked shortly save for her cloak. In a dramatic scene, Lang dares her to fling off the garment. She refuses, indignantly. When husband and guests enter she reveals herself, fully clad. After their departure, Isabella starts to write Harry. The devil joins her, and she is persuaded by him to write Lang she will leave her husband and come to him the following day. The devil takes the letter, saying he will deliver it. Instigated by the devil, Milli tells Elsa of Harry's unfaithful nature, and they leave consoling each other. When Isabella appears she asks for her letter. The devil explains he forgot to deliver it and Lang and Isabella retire to the studio. The devil watches them love-making and bewails the paradise he can never regain till mortals who resist temptation place him there. We see him next in hell receiving Lang and Isabella, who beseech his mercy. "You had your chance," he tells them, "God alone can save you now."
—Moving Picture World synopsis