Bashin is a grade 6 student who loves trading card games. The globally popular card game Battle Spirits is all the rage. Through some strange circumstances, Bashin acquires a Pyroxene which gives Bashin the ability to become a Card Battler. He can summon the monster Spirits depicted on the cards so they can fight each other. Bashin learns that the legendary X Rare Card actually exists, and he engages in fierce card battles with other rivals to get the X Rare Card.
The series follows the daily adventures of 6th year elementary school student, Toppa Bashin, who has a mysterious red stone pendant from his father. One day he meets J Sawaragi, the consecutive tournament champion, who possesses a similar white stone. J challenges Bashin to a battle in the alternate universe, Isekai World, where spirits are real.