Which of the respectable, wealthy guests who had gathered from every corner of Europe for an elaborate celebration tried to poison the English lord—an old friend of the agent Dorongo? Before any version even forms, a murder occurs at a secluded villa—and then another. Agent Dorongo begins an investigation and quickly realizes that, in principle, the motives to attempt the murder belonged to ALL the people present, while motives to kill are CLEARLY NONE among them. But something tells him: all three crimes are the work of ONE person…