在幽暗的夜晚，血色月光映照着古老城堡的诡异传说。描写老婆交换的文章

　　Philipe Guérande, a reporter working for the newspaper “The Paris Chronicle” who is investigating a criminal organisation called the Vampires, receives a telegram at work stating that the decapitated body of the national security agent in charge of the Vampire investigations, Inspector Durtal, was found in the swamps near Saint-Clement-Sur-Cher, with the head missing.