Ten years ago, Yejin and his sister Li went to practice martial arts under the sect of Wanfa. Since then, they have been far away from the complicated human world.Ten years later, the mysterious organization that claimed to be Void Legion invaded the sect, and then the world was in chaos, and the brothers and sisters were reinvested in the chaotic world.The sisters who are dependent on each other are taken hostage, and the disciples have been killed in one by one... At the moment when the bloodthirsty spell is opened, Yejin who knows himself, can he fulfill his commitment to everyone? And who is the last to be able to help the building, to save the devastated world?