Paris 1838, Prince Rodolphe vows on the deathbed of his friend Matilde to find Germain, the woman's son kidnapped by his father at birth. Disguised as a tramp, he wanders the city's slums encountering various characters who either help or hinder him.

Prince Rodolfo di Gerolstein
Sara
Notaio Ferrand
Maria, la Cantante
Germain
Lo Squartatore
Georges
Matilde
Pipelet