No One Grows Old, but the Mountains Remain Green

When he was practicing at Yusuishan, Xu Weiwan knew that he had two tasks on his shoulders. One is to find a sister, and the other is to help a person gain immortality. That person was the culprit who killed her master. After coming down the mountain, she met Ye Ransheng. Although they don't know each other, their fates are inexplicably tied together. While going around in circles, when she finally took out her remaining courage and dedicated her immortality technique to that person, everything changed drastically.