Gensokyo, a place secluded away from the Outside World due to the Human and Youkai's constant wars and battles. It was at this point that a barrier known as the Great Hakurai Barrier was formed so that Youkai can live in peace away from the Humans. Humans, however, did find their way into barrier and created a village for themselves. Humans and Youkai lived somewhat in peace with one another in Gensokyo. Several centuries later however an event occurred threatened to destroy not just Gensokyo and the Outside World, but the entire universe. Thus begins the Legendary Hero, Ziden Icrim, adventures through Gensokyo and other worlds began.