In the United Global Year (UGY) 193, the Earth is under attack from an extraterrestrial enemy; the Radam. The Radam are led by an even deadlier force, known as the Tekkamen.
Surrounding the Earth is the huge man-made orbital ring known as the Space Ring. The Space Ring was constructed well before the arrival of Radam and was the first human structure attacked by them. As the aliens attacked, those that were left either fled or were killed, and the Space Ring was largely abandoned, serving only as a battle ground for Blade and the Tekkamen.
