Twenty-one days. In a world ravaged by fire and descending into madness, Cavalo has been given an ultimatum by the dark man known as Patrick: return Lucas to him and the cannibalistic Dead Rabbits, or the town of Cottonwood and its inhabitants will be destroyed. But Lucas has a secret embedded into his skin that promises to forever alter the shape of things to come—a secret that Cavalo must decide if it’s worth dying over, even as he wrestles with his own growing attraction to the muted psychopath. Twenty-one days. Cavalo has twenty-one days to prepare for war. Twenty-one days to hold what is left of his shredded sanity together. Twenty-one days to convince the people of Cottonwood to rise up and fight back. Twenty-one days to unravel the meaning behind the marks that cover Lucas. A meaning that leads to a single word and a place of unimaginable power: Dworshak.