Sang Nian receives a system mission to humiliate Xie Chenzhou, the male supporting character. After several misunderstandings, the mission changes to winning his heart. In the end, however, she still meets her death at Xie Chenzhou's hands. Thinking that failure means being sent off to mine coal, she unexpectedly reincarnates three hundred years into the future. The system assigns her a new mission: redeem Xie Chenzhou, who has fallen into darkness and intends to bring down the world. No one knows that after her death all those years ago, Xie Chenzhou abandoned his path to immortality and journeyed to the underworld, enduring countless hardships just to find her again.