A determined young woman and a disturbed young man clash in the apocalyptic aftermath of a nationwide terror attack.Grace's dad taught her survival and self-defense, then sent her away to college hoping she'd never need those skills. All he wanted was to give her a fighting chance if something bad ever happened to her.Then it did.Near the end of Grace's freshmen year, coordinated terror attacks take place at dozens of locations around the country - including on the campus of Grace's university.Grace and her father barely have time for a single rushed phone call before they lose signal. With her roommate in tow, Grace embarks on a treacherous journey home and ends up in the crosshairs of another desperate traveler -- a seriously disturbed gamer who sees nothing but opportunity in a world that now resembles that of his favorite video games.