Kyle Stuart and Justin Underkoffler have never met, but they’ve known each other for years. Kyle is something he’s never been able to pin down a name for—serial killer, hitman, vigilante—and he likes taking the law into his own hands. He’s famous for killing humans who commit heinous crimes against nonhumans. Justin, on the other hand, is the Special Agent Deputy Director of the government agency that handles the affairs of nonhumans globally. He’s been hunting Kyle for years, and while he’s gotten close more than once, he’s never been able to get the unclassified criminal behind bars. Their game of cat and mouse seems unending, but then a new player comes on the scene, and suddenly, both of them are missing their oldest child. Will Kyle and Justin be forced to cooperate? Or will they race against the clock, individually, to get back what was taken from them?