It turns out that all those promises of everlasting love, all those vows to endure until the seas run dry and the stones crumble, were never meant for them. Bai Eryu is a demon, doomed to lose the one she loves forever. She and Zixiao were simply a love that came too late, and the final gift of Zixiao's life's work was all he had left to give her. Si Wangxi knows the story of how their fates began. Terrified they would miss each other again in their next lives, he offers half his lifespan in exchange for not drinking the Meng Po Soup. Bai Zijin says, “I've already begged the King of Hell to cut the tangled thread of fate between us. I don't want you to have any chance of falling in love with me again. We were fated to meet for three lifetimes, but never to be together. We needn't keep forcing it.” In this life, she has already drunk the Meng Po Soup. Heaven and earth bear witness, as do the sun and moon. The three thousand worlds of mortal life pass like the wind, and in the next life, she will be a stranger to him.