Disgraced former FBI agent Kevin Arneson once hunted the world's most dangerous terrorists. Now, back home in a tense, post-George Floyd Minneapolis, he takes on a new challenge when one of his closest friends receives serious death threats. The suspects: group of embittered, sex-starved, and sometimes violent young men called incels, who are terrorizing and then killing successful middle-aged women with no apparent connection to each other. As the death toll mounts, Arneson and Becket pursue the killers, burrowing through layers of deception. In a stunning climax, they uncover a monstrous scheme that goes beyond the murders, reaching back into their own troubled past.