An eccentric penniless Marquis plans a swindle on a life-insurance company: a killer will pay him now the insurance prize, will kill him in six months time, and receive the clean money then. Meanwhile, the Marquis will live his final six months of high-life. He receives the money, starts spending it in scenic Lisbon and its surroundings, and meets a beautiful girl for whom he changes his mind. Only, his plan was so perfect that there are no links between him and the killer...