In a world where tall spires fill the sky and unnecessary things are mercilessly discarded, Mogwi, who failed to prove his usefulness and was abandoned by humans as a child, wanders from place to place and ends up staying in a scrapyard. Mogwi, who is wounded, expresses hostility to everyone, but gradually opens up his heart to the robot Rom, who he meets by chance in the scrapyard. Mogwi knows that Rom desperately dreams of returning home, and together they go through hardships and adversities to find Rom's home.