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For centuries, the world's religions have been trying to explain the origin of man. And now Kirsch - a former student of Robert Langdon, a famous billionaire and inventor - makes a stunning discovery that can not only shake but also refute the postulates of all religions. Professor Robert Langdon is invited to give a sensational lecture at the Guggenheim Museum. But before Kirsch can present his incredible theory, he is murdered. The materials of Kirsch's lecture are protected by a 47-digit password... Now it's up to Professor Langdon and museum director Ambra Vidal to reveal the secret of its origins.

Difficult puzzles, escape from the Spanish police, deadly clashes, riddles similar to the bizarre buildings of the famous Gaudi, dizzying intertwining of Barcelona streets - and somewhere in this whirlwind is the source...