Mickey Haller has moved from criminal to civil court, but murder remains in his sights—in particular, the case of a chatbot encouraging the killing of a teenage girl.

Mickey files a civil lawsuit against the artificial intelligence company responsible for the chatbot and instantly finds himself on the wild frontier of the billion-dollar AI industry. Grappling with a terrifying lack of regulation and data overload, Haller partners with journalist Jack McEvoy. But they are up against mega-forces, and even the bravest whistleblower faces grave danger.

In 1997, IBM's Deep Blue defeated chess master Garry Kasparov with an unexpected gambit. In a Herculean new match of man vs machine, can Haller pull off a winning play for humanity?