In a world with a time and space of 3025, four children of destiny, led by a girl named Bright Moon Island, embark on a journey to find the legendary "Supreme Thought" that is the only one that can end and purify the "turbid air" in order to save the world that is gradually collapsing due to the "turbid air".
An organization called Crescent…
Those fates that are deeply bound to the four sons of destiny...
And that mysterious "highest thought"...
As the journey continues step by step, the secret is slowly revealed...