As the end of the century draws near, God`s and the Devil`s agents are racing to gain power. The Devil has been preparing by placing demons in beautiful works of art in order to lure unsuspecting humans into protecting them. It is up to Kaitou Jeanne, the reincarnation of Joan of Arc, and her angel guardian Fin Fish to seal these demons and prevent them from corrupting the souls of the innocents they possess. During the day, Jeanne is really high school student Marron, who along with her friends Miyako (a wannabe detective who`s life`s dream is to capture Jeanne) and Chiaki (who is also Jeanne`s rival, Kaitou Sinbad) tries to make it through to the next day...

(taken from animenfo.com)