Rick takes Morty and Summer to a post-apocalyptic version of Earth, where they are chased by a group of scavengers, known as Death Stalkers. Rick notices that the group is carrying a valuable rock of Isotope 322, so he and the kids join them in hope of stealing it. Summer falls in love with the Death Stalkers' leader, while Morty is given the strength of a giant arm, which takes him in search of its previous owner's killer.