Your parents died in an accident, leaving only you and your little sister, Dolina.

After you turned 15 and followed your master to the mountains and disappeared from there, the reason you didn't need to worry about Dolina was because she has an adoptive father who loves her very much.

After several years of cultivation, you have achieved a realm and power that you thought was unreal in the mortal world. After saying goodbye to your master, you are on your way home, going to Dolina's foster father's house.

What greets you is not the sight of a father and son sitting watching TV and chatting happily, but the scene of her foster father whipping her, Dolina sobbing and kneeling on the ground and being continuously beaten by him.