A different world ruled by no one and is protected by protectors and fighters; EXO Planet is the second most richest planet ever after the earth. Guided by the almighty Mama, not a single problem happens. Because of jealousy, the guider of ANDRO Planet declared war against EXO Planet and killed alot of protectors and fighters. After losing alot of protectors and fighters, the almighty Mama will recruit people from earth who She believes has the courage and strength in them. May it be girl, boy, young, old, skinny or fat.

Every person who has strength in them belongs to the fighters group who is very good with weapons while the person who has courage in them would belong to the protectors group and will receive a power. Back on earth, a Korean girl named Chae Han Bi was just having her normal day. Somehow, she usually hears voices calling her, sees lights and feel different. She just ignored them, not knowing that it was a sign for something. Until one day, someone unexpectedly came to her, asked her to follow and brought her to a new dimension.