Monsieur Hercule P.: can an immortal character die? No, he can't. This is the reason for this book, a fantasy thriller but very close to reality because a very thin line separates the difference between the knowledge of the secret of longevity and the determination of how much that is actually possible. It's the meeting of two different situations in two completely different places, which creates an interesting mingling between two worlds that are about to meet and reveal the most gripping of the stories. The subjects composing the tale are a lot for the many articulated and appealing knotting plots, which respect the characters' reality and psychology in the actual story, where everything happens. The message of the novel is perfectly up-to-date because based on actual events in a well-woven mix of plots catching the reader to the end. Will Monsieur P. accept to come back crossing that thin line?