Friar Bonaventura tries to dissuade Giovanni from his sinful love for his sister Annabella. Giovanni passionately argues that their love transcends societal conventions against incest. The Friar warns that Giovanni's lust will lead to his ruin, and instructs him to isolate himself for a week in prayer and repentance to cleanse himself of lustful desires. Giovanni agrees to do this in hopes of being freed from vengeance.