Cang Lan was the emperor in heaven, and Yuan Yu was the immortal in heaven. Cang Lan was poisoned by a poison that can only be cured by the treasure of the underworld. In order to save her, Yuan Yu lost her soul. Fortunately, the Emperor of Heaven protected her and fell into reincarnation. On the Nai He Bridge, he said, "The flower on the other side blooms for a thousand years and falls for a thousand years. The flowers and leaves will never see each other." Love is not cause and effect, fate determines life and death. You and I are just like the flowers and leaves of the other side of the flower, destined to have no fate." But how can Cang Lan believe that she and he are not destined to be destined in this life? She vowed: "Yuanyu, no matter where you are, I will find you!"