Long, long ago, in the universe there was a unicorn planet. The king on the planet guarded six powerful galactic weapons. According to legend, whoever possessed these six weapons could rule the entire universe. The alien evil force Bad Bad Legion attempted to possess these six galactic weapons in order to achieve their goal of ruling the universe. To protect universal peace, the king scattered and hid the six weapons on Earth. Tan Le, a little boy on Earth, accidentally obtained a galactic weapon and awakened the weapon's guardian robot, Tobot, starting a journey to protect Earth.