The boy named Ye Yang had been living an ordinary life, but one day he got something called the Book of the Demon King inexplicably because of a phone call. At the same time, he was told that if he didn't get the feather within a month, he He will die. Since then, his fate has returned to the right track... Different demon kings, different journeys across time and space, and those girls who signed a contract with Ye Yang. Facing these, Ye Yang will Where to go? And in the end, will he be able to fulfill his little ambition of building a Crystal Palace as a man? All of this will be shown to you here...