Robert Langdon, Harvard’s esteemed professor of symbology, journeys to the historic heart of Prague to attend a groundbreaking lecture by Katherine Solomon a brilliant noetic scientist and his new romantic interest. Katherine is poised to publish a revelatory book that could upend centuries of accepted belief, unveiling shocking discoveries about the untapped potential of the human mind.

But before her research can reach the world, a brutal murder shatters the event, and Katherine vanishes along with her dangerous manuscript. Langdon suddenly finds himself in the crosshairs of a shadowy, well funded organization, while being hunted by a terrifying figure born from Prague’s oldest and darkest legends.

The chase races from the Gothic streets of Prague to the hidden corridors of London and the towering skyline of New York. With time running out, Langdon must decipher cryptic clues linking futuristic neuroscience to mystical lore, all while evading those who will kill to keep the truth buried. What he ultimately discovers is a secret project so profound, it will forever alter humanity’s understanding of consciousness.