The Hero's Sword, which was used 300 years ago to defeat the Overlord, has been stolen, and demons are becoming more and more common. Rain, a member of the aristocracy, is ordered directly by the King to get the sword back, and sets off on a quest with his attendant, Viola, to find the sword.

They don't know, though... They don't know that their quest will become a journey through time, to places far off in the past. The binding strings of fate, and the desire to trust someone... Where will these tangled threads lead them?