In order to conquer Margaretella with expensive presents, a young man called Tore steals his mother's jewels but Margaretella seems to prefer Carluccio who challenges Tore to a duel and wounds him. Forgiven by his mother just before she dies, Tore takes revenge by killing Margaretella, but even in prison he can't stop thinking to his victim.

Nanninella, a young girl, is exploited and abused by her father, whom she maintains with her waitress salary. She falls madly in love with Tore, a handsome and upright man, whose friend Carluccio plots to have Nanninella for himself. Based on a popular Neapolitan song, ‘A Santanotte is the earliest extant feature film by Elvira Notari, Italy's first and most prolific female filmmaker.

Lost Dora Film production based on the novel by Francesco Mastriani