RAVE takes place on another world that was at one point dominated by a light stone (Rave), and a dark stone (Darkbring). There was a fierce battle between the two which led to an explosion that destroyed 1/10 of the world. After 50 years, Darkbring was revived by a group called the Demon Card. Demon Card uses the power of Darkbring to bring chaos to the world. Only the power of the light stone can resist it… Rave. Could Haru who catched Plue from the ocean and inherited Rave from Rave Master Shiba save the world? Watch as his adventure begins!
Descriptions taken from AniDB.net