夜幕降临，血影浮现。拼车夫妻

　　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.