With no other choice, you approach an old castle seeking shelter from the rain. Prince Baekhyun may seem warm and friendly on the outside, but he seems to have a secret he's desperate to keep from you.  

The people of EXO planet are now well integrated in the society in this realm they call Earth, after the demise of their planet centuries ago. The nine powers that guard the Ethereals are Ice, Water, Healing, Light, Thunder, Fire, Earth, Teleportation, and Wind. There are nine kings that rule their people, and these nine kings have nine sons. Byun Baekhyun is one of the nine princes.