The story of a young boy,Riki Ryugasaki,who is a rookie to B Daman.He gets his B Daman,Thunder Dracyan,one of the five legendary dragons,for helping the B Daman fan club owner in a festival.He unravels the mysteries of B Daman overtime along with becoming more of a professional and along with his friend Samuru and the other dragon owners,heads to save the world.