The world is plagued by a plague and is on the verge of extinction. The dead walk the earth and seek to consume the living, who, left in a catastrophic minority, are struggling to keep up their defenses. Change begins when one zombie, whose name began with an "R" when he was alive, saves a girl instead of eating her. The friendship forged between the representatives of the opposing sides threatens both with the worst possible consequences. But R and Julie, without realizing it, hold in their hands the simple and only key to saving the dying world.