It's the year 2025, and out-of-control overpopulation forces humans to colonize outer space in this anime adventure. But when a returning Japanese spaceship crashes in Tokyo, it releases a mysterious creature picked up on Mars. Now, the massive monster known as Negadon roams the streets, hell-bent on destroying everything in its path. Only robotics expert Dr. Ryuichi Narasaki and his robot Miroku can save the Earth -- and all of humanity.