Suddenly I had such an inspiration. Thinking about the alternation of day and night, a sad feeling came from nowhere and could not be dissipated for a long time. The alternation between day and night was originally very short, but he and she still fell in love. Moreover, in order to be together, they gave up their identities as immortals and went down to earth to find each other in this reincarnation. However, with the obstruction of the "king", Ling'er's intervention, and interference from all aspects, can they be together...