In the year 700 of the Imperial Calendar, the whole empire was under war conditions due to Zolt's rebellion which was raised after the death of the Emperor Regilio. The fall of the empire was only a matter of time as Zolt occupied all territories of the other Emperor-electors except for Archbishop Milange. Milange decided to bestow the title of knight and legendary power upon a man as his last hope. The player takes the role of this man and pilots the giant magical robots known as Frame Gride to face the rebel forces.