The remembrance of the past seems banished from Seraphine’s heart, and everything indicates a state of peace and happiness.
Don Juan withdraws a moment, when a sailor enters the room.
It is Don Alvaro, who, unable to forget his love, has followed Seraphine to Barcelona. He overwhelms her with his affection; but she shows him so firmly and eloquently that his pleading is in vain that he in turn resolves to conquer his passion and leave her for ever.
He still lingers near, but makes no attempt to approach her again.
One day, during the Carnival, Don Juan’s villa takes fire. Seraphine is borne insensible from the house by her husband, who confides her to Don Alvaro, whom he does not, of course, recognize, and returns to help the others who are in danger.
Don Alvaro, meanwhile, is left with Seraphine in his arms. His love revives stronger than ever in the terrible temptation, and he bears the still insensible Seraphine to his ship, and makes sail with the greatest haste.
Don Juan does not return until the ship is under way, discovers too late that he has been deceived, and throws himself into the sea in order to overtake the fugitives.
In the last act we find Don Juan at Gaeta, disguised as an artist, in order to obtain more easily access into private houses, and discover who has stolen his wife.
He is introduced to Prince Urbino, who commissions him to paint the portrait of a beautiful woman whom he has seen at a neighboring forester’s house, which he visits in order to meet Portia secretly.