Long ago in acient times, people believed in Angels and they often see them through their belief. But as Angels are real in these times, Devils, who has shown only malice and destruction also co-exist with them. So, to protect the people, the leader of the Angels sent vessels of their own to the human world. These vessels will protect them and nurture them to do good. They take the human form and blend in with them but they possess different divine powers.

One can see the future and the destruction. One can heal any kinds of sickness and spiritual wounds inflicted by any enemy. One can control the light in times of darkness and the strongest of them is He, who can purify everything and make ones' heart pure and warm. 

These vessels will live on forever but in one condition--that is to never fall in love. The Devils devised a plan to destroy the vessels sent by Angels but they failed day by day since their power becomes stronger because of the peoples' beliefs. 

Until She came along and enticed the heart of the strongest vessel of the Angels. The Devils saw this as an opportunity and ceased the remaining vessels while their strongest protector was weak and distracted. Slowly, the humans who once believed the Angels and continued to do good started to make contentions and wars and killed each other--weakening the fortress of light with the darkness that started to elope them. 

The Commander of the Angels then retrieved the vessels who are now frail and weak. He strengthened them and prepared them to battle except for the strongest one. He punished him and made him invisible by disobeying his condition. No one in the world will know and see him except for the Angels and his co-Vessels. 

For centuries, he felt nothing but grief and penitence. He saw his beloved woman, who caused his punishment, walk away with someone in happiness while he stays in hidden and cannot be seen. He saw the humans fall because of his own fault and his pure heart was slowly tainted black until the darkness finally ate him. He became stronger than the Angels and the Devils and he destroyed them one by one until these two forces hid themselves to protect their heritage.

With the last of his power, the Commander of the Angels gave his spiritual powers to a certain woman in the future and she is destined to destroy him. He who caused chaos and He is called the exiled.