In order to preserve Earth's natural resources people searched for alternative sources of energy. They discovered an unlimited power that could be use to create but also to destroy.
The secrets of this power, also known as the Holy grail, is guarded in the city of Novartis. But something terrible happened three months ago when a mysterious individual challenged the King and his guards. Red is the son of Akira, the King's guard and he was there when the city was taken. All he could do was save Kazuki (the King's son and heir to the throne) and escape from the city with the help of his friend Miho.
Right now they are on a mission of getting their beloved city back. But Red might be hiding something - this mission could be something he must do in order to redeem himself.