After a zombie apocalypse R (Nicholas Hoult), a zombie, wanders around an America which is now filled with abandoned buildings, broken down cars and hordes of his fellow undead, including his friend M (Rob Corddry). R and M achieve rudimentary communication with grunts and moans, and occasionally near-words. As a zombie, R constantly craves human flesh, especially brains, as he is able to “get high” on the memories of their former owners. Julie Grigio (Teresa Palmer) and a group of her friends are sent out by her father from a heavily-guarded walled-off human enclave in the city to recover medical supplies from abandoned buildings. R and a pack of zombies attack the group, and after R kills Julie\’s boyfriend and eats his brain, he is overcome with love for her. He rescues her from the rest of the pack and takes her back to an airplane at an airport that serves as his home to keep her safe. The two develop a relationship, causing R to slowly begin to come to life.