Juliette, granddaughter of Gisèle Casadesus and Lucien Pascal, is pregnant. She desires a cinematic trace of her grandparents, whom she admires. She asks Ivan to stage The Ghost Sonata in Lucien's retirement home in the Pigalle district. In this fantastical play by Strindberg, Lucien Pascal plays the role of a very rich man who orders the murder of a mysterious milkmaid. Ivan plays the role of the young man whose father carried out the murder, and who subsequently killed himself. A strange friendship binds the characters of Lucien and Ivan, like a perverse filiation...