She was originally a cold fairy above the nine heavens. She was demoted to the mortal world because of violating the laws of heaven, and her memory was sealed. He is a down-and-out scholar in the human dynasty. He is full of knowledge but fails in many attempts, and his life experience is a mystery. An unexpected encounter entangled two parallel lines that should not have intersected. In the rolling world of mortals, they experienced dynasty changes, grievances, and troubled times together. When her memory gradually awakens, when the truth about his life experience is revealed, the entanglements in the past life, the love in this life, and the barriers between immortals... How will they choose? Should he return to the fairy world and cut off his love, or fall into the mortal world and create a stunning fairy tale together?