Heir to a huge fortune and goddaughter of the Queen of France, the beautiful Florentine Lorenza Davanzatti has been promised as a wife to a worthy young man from the noble Strozzi family. However, the happy dreams of the lovers were not destined to come true: on the eve of the wedding, the groom was found on the threshold of his own house with a dagger in his heart. With a dagger, on the handle of which a lily-shaped pattern is laid out with rubies, the ruthless killer pinned a note: “Anyone who dares to encroach on the hand of Lorenza Davanzatti will not leave me alive.” The inconsolable bride wants to retire to a monastery, but her influential Italian relatives have completely different plans - and so the beauty goes to Paris with an important mission - to get married.