As part of a top secret CIA project, Flynn Carroll's police unit is tracking down rogue aliens from another world—criminals who have committed brutal and bizarre murders. Flynn has been forbidden to take lethal action against the alien murderers—but as the bodies begin to pile up, something must be done. Flynn finds himself cut off from his team, struggling to discern the true nature and mission of this terrifying enemy, all while protecting those around him from this horrific bizarre threat. But as Flynn gets closer to the truth, he finds himself facing not only some of the most dangerous and frightening criminals ever seen, but also questions about his own existence: who—or what—is he?