Using the "Between Stone" created by witches as a key, the people of the Empire, seeking greater power, unleashed the creatures sealed underground in ancient times.
Calling themselves "Emperors," they spilled their blood across the sky screen and used eerie curses to bring down crimson rain, corroding the entire continent. They cursed all living beings, granting them immortality... and making them slaves to the Emperors!
The Empire fell, and the remaining races of the continent were left to pay the price for this calamity!
Sheltered by the Sky Stone, the surviving races formed an allied army and set out to fight the Emperor creatures.
As an Imperial, "Allen" was saved by the people he had once slaughtered. He became partners with "Xun" of the Wind Elf clan, joined the allied army, and embarked on the road to atonement.
--I am an unforgivable sinner, because a murderer can never be forgiven. I will fight with blood and sweat on the battlefield, then await the day my judgment comes.