Cager has been transported to the Tennessee, a giant lunar-cruise ship orbiting the moon that his dad owns, by Billy and Rowan to help him shake his Woz addiction. Meanwhile, Earth, in the midst of thirty simultaneous wars, burns to ash beneath them. And as the robots on board become increasingly insane and cannibalistic, and the Earth becomes a toxic wasteland, the boys have to wonder if they’ll be stranded alone in space forever.