In a world ravaged by a mysterious epidemic that has turned people into savage zombies, a dead man wakes up—without a name, without a memory, and without a beating heart—but he possesses something no other zombie possesses: consciousness. He's the only zombie who knows he's a "living dead"... but he doesn't want to stay that way. He later names himself Mr. Zombie after finding a torn ID card on an old corpse that reads "Mr. Z...." From there, he begins a journey to discover who he is, why he's different, can the dead change, and is humanity even worth surviving?