Gabriel is timid, delicate and gentle, and Clementine is assertive, selfish and frantic, she does not know how and does not want to lose. Brother and sister grew up together and could not imagine life without each other. Time played a cruel joke on them: the grown-up children fell madly in love with each other. Uncle Martin, who raised his orphaned nephews from infancy, solved the problem quickly and harshly: he sent Clementine to a boarding school. Soon the passions subsided, but only until the lovers received a large plump envelope with an anonymous letter from an unknown person...