Five years after working triage during America’s terrible Day of Destruction, Philadelphian Dr. Ethan King wants nothing more for himself and his wife than a normal life. In the aftermath, however, life is anything but normal. The mysterious nerve gas unleashed during the nationwide terrorist attack has left its disturbing mark among the millions of victims, namely brain abnormalities in unborn children. These children, dubbed Inexorables, live up to their name: they are ruthlessly violent, irrepressibly psychopathic—and incurable. They kill without thought or remorse, and inflict torment on their victims with childish glee.