La marque des quatre

A consulting detective and his companion investigate a puzzling case that begins with a mysterious client and a claim about lost treasure, leading them into a tangled history of secret pacts, betrayals, and desperate fugitives. The inquiry proceeds through close observation, logical inference, and daring action, revealing intersecting motives of love, greed, and revenge. The narrative alternates between methodical detection and its human consequences, exploring questions of justice, loyalty, and the costs of obsession. The mystery resolves through a combination of forensic insight and confrontation, forcing characters to reckon with moral and legal outcomes.