Paris, 50s of the last century. The last representatives of the family of royal bastards, the Fitz-Roys, live here. One of the richest families is forced to hide their heirs from cruel and vicious murderers and swindlers trying to take possession of the huge Fitz-Roy fortune. The most brutal murders are committed, cunning plans are drawn up. Who is the rightful heir to untold riches? Prince Georges de Souzay? Or maybe his secretary Albert? And who are Clotilde de Clar and Lirette, the little beggar living in a circus van? Lirette's tender love for Clément, the marriage contract between Clotilde and Prince Georges, Albert's fatal love for Mademoiselle de Clar find a bloody outcome in the de Suzeev mansion.