Gensokyo...a land full of long forgotten creatures and magic. Many a day has gone peacefully in this land separated from the outside world, until one day a mystical artifact known as the Pandora's Box arrives and begins to wreck havoc across the land. If not stopped, then all shall be returned to nothingness. Join Reimu and her friends on a quest to defeat the entities of the Pandora's Box and save their beloved land from the forces of chaos!

This game follows a style similarly to the Final Fantasy series, incorporating a vast amount of abilities, monsters, and ideas from the Final Fantasy universe, while still retaining the Touhou nature of the main series. Various aspects of the Final Fantasy series incorporated into the game includes the Blue Magic system, Gil Toss, Scan, Steal, and Chakra in-battle, a Skill System similar to that found in Final Fantasy II, and the characters playing roles similar to various classes in the Final Fantasy series such as the Black Mage and Knight. However, this game also incorporates ideas from various other series, including Legend of Zelda, Valkyrie Profile, and Super Mario RPG. Players can control up to 4 characters at a time in any given battle, but can have access to as many as 30 playable characters, several of which are optional.