Three hundred years ago, Shen Xi, a max-level cultivation expert and one of the Six Realm Spirit Lords, was framed by the Great Desolate God, another Spirit Lord. She reincarnated three hundred years later into the body of a little koi spirit. Unexpectedly, the koi spirit's parents had once received her kindness, and they possessed an orb of spiritual energy containing her power. This became a magical treasure that allowed Shen Xi to recover her strength quickly. She is drawn to Ao Yue, a former immortal companion who transformed himself into a member of the water-snake clan using his remaining divine power. Moving from confusion to acceptance, she gradually comes to want to protect Ao Yue. After recovering her power, she finally understands that the rules of the Six Realms had suppressed her memories. In the end, she gathers Ao Yue's scattered soul once more, and the two roam freely between heaven and earth.