In a quiet, small town in France, Louis Lucas Belvaux lives in a large, tumbledown house he tends for his disabled, eccentric mother. By day he works as the town’s postman, delivering letters with a steady, unassuming rhythm. His mother, Madame Cuno Stéphane Audran, remains a formidable presence in the home, insisting on routine and control, while Louis tries to balance her care with his own fragile independence. The house becomes a battleground as three local power players—the lawyer Lavoisier Michel Bouquet, the doctor Morasseau Jean Topart, and the butcher Filiol Jean-Claude Bouillaud—band together to buy and redevelop the property. They operate as a syndicate, pushing offers that Louis and his mother resolutely refuse, insisting on staying where they are despite mounting pressure and constant harassment.
Louis and Madame Cuno endure a steady drumbeat of intimidation from this unpleasant trio, who use every influence they have to chip away at their resistance. Henriette Pauline Lafont, the post office clerk, and others in town notice the growing tension, yet Louis clings to his routines—going about his duties as a postman by day and shielding his mother by night from the relentless pressure of those who would see the house disappear. The harassment escalates until one night Filiol becomes especially obnoxious, and Louis takes a retaliatory step that will set off a dangerous chain of events: he pours sugar into Filiol’s car tank, hoping perhaps to slow down the predatory ambitions surrounding the house.
The resulting accident kills Filiol and draws in Inspecteur Lavardin Jean Poiret. Lavardin is no-nonsense and unafraid to use coercive methods in pursuit of truth, including rough interrogations that verge on waterboarding. As the case unfolds, it becomes clear that the Connexion between the three powerful men runs deeper than simple greed. Lavoisier has a mistress, Anna Foscarie Caroline Cellier, who is close with Morasseau’s wife, Delphine Moreasseau Josephine Chaplin. Women linked to each corner of the doctor’s and lawyer’s lives begin to vanish, tipping the investigation into a darker, more intricate territory than Lavardin initially anticipated.
As Lavardin digs deeper, he uncovers a web of financial motive: Anna’s money becomes the central resource the syndicate hoped to leverage for their plans. A turning point arrives when a plaster cast of a nude Delphine is installed in Morasseau’s garden, and within the base Lavardin discovers Delphine’s body. The revelation reframes the entire case, indicating that Delphine’s disappearance was tied to the money and the hidden loyalties around the Morasseau household. The detective pieces together how the money, not emotion, drove the scheme, and how the syndicate miscalculated the consequences of their pursuit.
In the aftermath, the motive is laid bare: the syndicate’s plan hinged on exploiting Delphine’s resources and removing obstacles, including Delphine herself, who had intended to start a new life with a lover rather than be a tool in their financial scheme. The discovery of Delphine’s body inside the plaster cast in Morasseau’s garden crystallizes Lavardin’s understanding of the danger that surrounded Louis and his mother, forcing all players to confront the moral and legal costs of their ambition.
Yet amid the violence and deception, there are small, human moments that temper the tension. Henriette’s persistence gradually earns Louis’s trust, and the two begin to bridge the gap between his ailing mother’s demands and his own yearning for connection. The case reaches its quiet, uneasy close as Lavardin asserts that he will forget about the sugar incident, choosing to move forward with the knowledge he has gained rather than let vengeance define the town’s future. The story leaves a haunted, reflective note on loyalty, aging, and the fragile sanctity of a person’s home in the face of ruthless, calculating greed.
