Carthage, 6th century B.C.: Ariadne, daughter of the philosopher Pythagoras, receives a scroll with news that embodies her worst nightmare. The terrible message includes an inverted pentacle, the abominable symbol that represents the opposite of her father's lofty teachings. Immediately a vertiginous spiral of murders is unleashed behind which a powerful and ruthless mind is guessed. Spain, News: Elena, Daniel and Irina investigate the limits of the brain and the possibility of increasing its capacity. When they meet through Mensa - the world's largest organization for the gifted - they will discover that nothing is what it seems and that they are the decisive pieces of a war that began 2,500 years ago. The protagonists of both periods will try to discover the identity of their enemy before kills them all... but they will find answers for which they are not prepared.