EXO is blasted off to earth after the "bad guys" invade there planet. when there ship lands a powerful cristal falls off there ship and they need to look for it in order to ever get revenge on there enamys and get back to there planet. as they look they plain that well on earth they will plain on how to get revenge.The  cristal is being heald by a girl who is able to control the cristal.Yerin ends up houseing the boys and learns all about them. but what happends when she get a little close with a memember of EXO?