Rez is a Mars rover—his full name is Resilience. He was built to fly to Mars. He was programmed to think logically and make rational decisions. All of this is necessary for a successful mission on the Red Planet. But maybe a bug slipped into the code, because Rez begins experiencing something very close to human feelings. Can a robot have feelings—and won’t they risk the entire operation? Millions of people on Earth are watching his mission—will Rez have the determination, courage, and grit to achieve the goal… and survive?