When the enigmatic billionaire founder and CEO of Tetration, the world's most powerful tech company, is diagnosed with terminal cancer, he hires a failed novelist, Josh Cohen, to ghostwrite his memoirs. This tech mogul, known only as 'Principal', takes Josh deep into his own mind. Accompanying Josh on a mind-bending world tour, Principal soon initiates Josh into the secret pretext of the autobiography project, and the life-or-death stakes that surround its publication.