She is the Qingqiu Princess, the last hope of the nine-tailed fox clan. He is descended from a devil god, raised by his master to become a vessel for the destruction of the three realms. A trial in the mortal world brings the amnesiac her together with the cultivator him in a secluded valley. He teaches her to write and paint, and she falls asleep beneath the peach blossoms he paints. They think they can grow old together, only to discover that in their previous lives, she was the one who sealed him, and he was her sworn enemy, the devil god. When their trial of love is over, she has no choice but to seal the person she loves most with her own hands. A thousand years later, the seal is broken, but the one who returns is the devil god's body, not her beloved. In the end, clutching the last remaining thread of his affection, she remains forever locked in the memory of their love, slowly fading away. And the cold lamp he became will never shine again.
Theme: Love means knowing you will lose someone, yet still being willing to give them your whole life.