Two fearless investigators unite to stop a media-savvy serial killer from carrying out a cataclysmic crime for all the world to see in a riveting thriller by a Wall Street Journal bestselling author. The FBI calls on former agent Jessica Blackwood to look at a puzzling crime. A wildlife officer has found the body of a popular YouTuber encased in an obelisk made of salt in a remote refuge. When the agency is tipped off to a second body, that of a TikTok star chained to the bottom of Nevada’s Pyramid Lake—her hands clasped in prayer—Jessica recruits a trusted colleague of her own: Floridian underwater investigator Sloan McPherson. It appears to be the work of a ritualistic serial killer preying on influencers. That tracks when a third victim—a fantasy-game live streamer—barely survives a pipe bomb attack. But in navigating the social media world of instafame, manipulation, and deception, Jessica and Sloan know how illusory appearances can be. As the threats multiply across the country, they fear they’re playing with something more extreme than they imagined: a killer’s endgame that could be nothing less than apocalyptic.