The survival action manga is set in the not-so-distant future, where a new virus that turns humans into zombies has spread around the world. Despite plans of wiping out the zombies with weapons of mass destruction, the zombies still roam the world, spreading fear among humans. Months and years pass, and a zombie hunter named Niki travels around the world with his partner. Niki faces a horde of mutated zombies, psycho zombies, and odd zombie "creatures" as he tries to find a place to live peacefully.