When a new person appears in secular society, and even a young and rich prince, and a foreigner at that, everyone strives to get to know him. And if he proposes to a young debutante, this cannot but cause amazement and envy of socialites. Princess Lisa Khovanskaya accepts the offer of overseas guest Guido Cavalcanti to become his wife. The groom invites his bride to Italy, to his native land. There Lizanka finds herself in a whirlpool of terrible, mystical events and almost loses her life. What dark secrets does the palace of the Italian princes keep? What plans does the groom, who turns out to be a mysterious stranger, have?