Synopsis：On the night the undead swarmed, Sarah’s husband abandoned the shelter just to take his childhood sweetheart to a mountaintop fireworks show. Sarah knew those fireworks would lure in a tide of zombies. To stop them, she aimed a gun at the other woman—and paid with her life. When she opens her eyes again, she’s back at the start of the nightmare. This time, she’ll save everyone trapped inside the doomed shelter, even if it means becoming the villain in their eyes. Because once the fireworks explode across the sky, no one survives.