Dan Bashin is a young boy who dreams of winning the Battle Spirits tournament. One day, while following a strange girl he meets at the championship, he is transported to another world, Granroro, where Battle Spirits is the most popular game and the Spirits materialize and battle. At Granroro he meets a sorceress called Magisa, who explains to him the reason why he was sent to that world: Dan, in fact, is the red warrior and together with the other warriors, called the Masters of Light, he will have to defeat the King of the world Elsewhere.