After many years of rambling across Europe, the aging Giacomo Casanova is impoverished. He wants to return to the Republic of Venice but he doesn't dare going there directly because he was a fugitive when he left. While he tries to find a way to get a pardon, he meets a young lady named Marcolina. The more he shows his affection, the more ostentatiously she rejects him. Even so he doesn't give up on her because her lover Lorenzo has grave gaming debts. In return for the required money, Lorenzo tells Casanova about a looming secret rendezvous with Marcolina. Moreover, he lets Casanova take his place. Under cover of the night, Casanova finally seduces her. Lorenzo later feels his honour was besmirched and demands satisfaction. Casanova kills him in a duel and then goes home to Venice.
