Ver en Cuevana. It is carnival time in Munich and participants are overindulging in alcohol and sensual pleasures. "Follow us into madness" beckons Lys who is drunk on life, but the sensitive Henry does not follow him. Lys has betrayed his fiancé, as Henry once betrayed his lost love Anna. In memory of Anna and his cruel Dickensian childhood, Henry challenges Lys to a duel to try to appease his guilt.