Rocket Lee is a 17 year old girl who has grown up in the zombie apocalypse who are now known as undead. She lived with her Mother until one day a war breaks out between communities causing everyone and everything Rocket has ever known to be gone or dead. She goes and joins an orphanage for years until she escapes and takes a 12 year old girl under her wing. Rocket and this girl have one goal: travel down south and together, build their own community while also trying to survive the undead apocalypse.