In the zombie-ridden city of Antipolo, Ray—a former reserve soldier who barely survived a mysterious fever—must lead a desperate group of students out of their besieged high school. Haunted by the disappearance of his family, Ray battles relentless hordes for supplies and survival. As the "Z-Hour" strikes, he must navigate the treacherous hills of Rizal to find a rumored safe zone, all while making brutal choices where every bullet counts and every second could be their last.