Ten years ago, Yejin and his sister Li went to practice martial arts under the sect of Wanfa.
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.Since then, they have been far away from the complicated human world..The sisters who are dependent on each other are taken hostage, and the disciples have been killed in one by one.