"The Crime of the Boulevard" is a mystery novel set in Paris during the late 19th century. The story revolves around the investigation of a shocking murder that takes place on a busy boulevard in the heart of the city.The novel begins with the discovery of the body of a young woman, found brutally murdered on the Boulevard Montmartre. The victim is identified as Madame du Verron, a wealthy widow with a mysterious past.As the police launch an investigation into the murder, they uncover a web of secrets and intrigue surrounding Madame du Verron and her circle of acquaintances. The suspects include her estranged husband, a jealous lover, and various other individuals with motives for wanting her dead.The investigation is led by Inspector Dantin, a dedicated and experienced detective who is determined to solve the case and bring the perpetrator to justice. As he delves deeper into the mystery, Dantin unravels a complex web of deception and betrayal, uncovering hidden truths that shed light on the identity of the murderer.