A virus comes ashore aboard a strange fish, and civilization collapses. Zombies run rampant, but a shot to the head is useless: only destroying the heart can bring true death. Lu Wen and the other survivors struggle along the most brutal road to survival. No superpowers, only iron wills, roaring guns, and the warmth of standing back to back. In an age when even a heartbeat is a luxury, they vow to fight for one last, powerful heartbeat of their own...