Genre: Action, Adventure, Mecha, Science Fiction

8 Years previous: A kindly couple is driving home in a terrible winter blizzard. The young lady wishes upon a falling star that they have a child. Then, the falling star lands in front of their car in the form of the MechaSpace Lion Galeon, causing them to fall out of the car. It opens its mouth revealing a small baby. The woman, Ai, takes it, ignoring her husband's warnings, and Galeon takes off again for space. For 8 years the Amami family raised the boy, Mamoru, as their own. Back then, who could have know what part this child would play. The present: Mamoru's 3rd grade class is on a very special trip to...the junkyard? The flies are bothering Sensei and the rest of the class members are either holding their noses or looking at junk. Mamoru wanders off for a minute and into a garbage cave, where suddenly the machinery comes alive, the TV sets showing the faces of the Four Kings of the Machine World. As Mamoru runs to inform the others, the mountain of garbage transforms into a horse-man monster. Soon, Shishio and the GaiGar mecha are on the scene to fight the evil Zondar robot, and save the children. When the GGG realize the importance of young Mamoru, and his own special powers, he joins the fight as a member of the gutsy Geo-id Guard...and so begins the story of Brave King GaoGaiGar!