From Tokyopop:
The Continent of Song is in chaos. The sinister secret society known as Demon Card is using the power of Dark Bring to destroy everything in their path. The only things capable of stopping Dark Bring are the Rave stones. Unfortunately, the Rave Stones were scattered around the globe in an explosion 50 years ago, so now they must be collected by the Rave Master in order to stop Dark Bring once and for all. This new task has been given to Haru Glory; a sixteen-year-old boy from Garage Island. The World's fate now rests on the new, young Rave Master.