12 Royal Mutants were given a mission from the King of the Western Kingdom,EXO,to find the missing princess of the Easthern Kingdom,Pearl.The Mutants were the princes of EXO. The princess, known as Black Pearl, of the Easthern Kingdom had been missing since the Supernatural War, 14 years ago. She was believed to be killed by the Werewolves of the Southern Kingdom. However, the rulers of the Easthern Kingdom knew that she was alive. They kept her safe in the arms of an old woman from the Western Kingdom as they knew that once the society knows that the Black Pearl is alive,all hell would break loose.

Park Sora,the Black Pearl, didnt know her true identity. The Old women that had been taking care of Sora kept it as a secret. However, the old woman was told to tell Sora of her true identity when she turns 19, when she is the most powerful being on earth.