In a post-apocalyptic USA, the survivors live in a city surrounded by walls that separate them from the living dead. Their leader Grigio sends a group of teenagers, including his daughter Julie, her boyfriend Perry and her friend Nora, to the outside to collect food and supplies for the population. However, they are surprised by a group of zombies. Among them, R, who is a young zombie without recollections but very introspective. R eats Perry's brain and revives his memories and sensations with Julie, and he falls in love with her. R saves Julie from the other zombies and hides her in the plane where he lives. Along the days, they develop a weird relationship and become friends. When a group of zombies led by R's friend M finds Julie, R protects her. Soon the zombies including R change their emotions and are capable to dream. But the fearful Bonies are seeking out Julie and R...
With much of the world's population now an undead horde, R is a young and oddly introspective zombie. While fighting with and feeding on a human scavenger party, R meets Julie and feels an urge to protect her. What happens next is the beginning of a strangely warm relationship that allows R to begin regaining his humanity. As this change spreads through the local undead population like a virus, Julie and R eventually have to face a larger issue when the very nature of their friendship is challenged. Caught between the paranoid human forces and the ferocious "Bonies", zombies who are a mutual threat, R and Julie must find a way to bridge the differences of each side to fight for a better world no one thought possible.