It s been six months since Rachel Siprien disappeared. At the request of Rachel s mother, private detective François takes over the investigation. The young woman, with a complex and multi-faceted personality, is part of a strange network made up of her best friend, her ex-boyfriend, her stepfather and everyone who knows her well or even slightly. François begins to frequent these various friends and acquaintances, and penetrates Rachel s daytime and nocturnal habitat. He spies, asks disturbing questions, and intentionally fills in the blanks left by those he questions.