After human civilization were destroyed and rebuilt for several times, the world was now a place where three floating continents: Yulgaha, Yanuess, and Urt, move slowly through the sky.

Yorn, a boy born to Yoniha the Foreseeing Maiden on Yulgaha, was separated from his mother and brought to live on the surface when he was five years old.

Ten years later, Yulgaha sent Witto and Hairra to investigate Yorn, as the boy who turned out to be a "God Killer".

Before leaving, Yorn learned from Ulgar that there was a tournament, which held every ten years and granted the champion to live in Ëdens.

In order to return to Yulgaha and reunite with his mother, Yorn decided to fight in the tournament, which would be held three years later, while Ulgar agreed to train him during the journey.

The story is set in a world where two floating islands named Yulgaha and Yanuess slowly move through the sky.

Although the foster father that raised him was poor, Yorn grew into a bright, chipper young man.

One day, Yorn is attacked by Hairra, a woman who is later revealed to be a puppet from Yulgaha, while he is forging a sword.

Hairra proceeds to incapacitate Yorn, but is prevented from killing him by the arrival of a mysterious young girl.

Hairra attempts to kill her, but she transforms into a young woman armed with a staff (Seeda) and fights back.