Shen Zhiheng, a young man suffering from a terminal illness, travels through time to Xinghai City, ten years into the apocalypse. Unexpectedly, he possesses a body immune to zombie poison and becomes sworn brothers with four eighth-rank Zombie Kings. To find a way to end the war between humans and zombies, he ventures alone into Freedom City, enduring robberies, framing, and deadly predicaments in the zombie fighting arena. Starting as a zero-rank survivor, he rises to become the captain of a zombie-hunting squad. As the four Zombie Kings infiltrate the other major cities, a plan that will change the fate of all five cities officially begins.