While assisting Professor Ochinomizu in exploring planets, Astro Boy stumbles upon a celestial garbage heap floating in space. Among the discarded robotic inhabitants, he rescues Bemu, a weary soldier on the brink of deactivation, and brings him back to Earth. Their initial weariness of battle evolves into a heartfelt bond as they spend time together. However, a crisis emerges when the garbage star drifts perilously close to Earth, threatening catastrophic destruction. With chaos looming, Astro faces a daunting choice to prevent the impending collision. Can he safeguard both a tranquil Earth and his cherished friendship with Bemu?