Billionaire, futurist and militant atheist Edward Kirsch made a discovery that could shake the foundations of society and crush all religions. And he longed to share that knowledge with the world. Kirsch organized a ceremony at the legendary Guggenheim Museum, inviting the entire color of science. But at the very moment when the futurist was ready to reveal to the guests the secret of the origin of mankind, his speech was cut off by the bullet of a hired killer... Fortunately, Harvard professor Robert Langdon was among the invitees - the only person who could restore the course of Kirsch's research and find his killer. For the sake of this, the hero will have to make a risky journey through Catalonia, dive into the abyss of church secrets, solve a tricky cipher and work together with artificial intelligence...