Bai Qian, a nine-tailed fox and the youngest daughter of the Fox King, becomes a disciple of the God of War, Mo Yuan, on Kunlun Mountain. When a deadly war erupts, Mo Yuan sacrifices himself to seal a powerful demon lord.

Seventy thousand years later, Bai Qian tries to reseal the demon but ends up in the mortal realm, stripped of her memories and powers. Living in seclusion, she saves Crown Prince Ye Hua—unaware that he is her heavenly fiancé and bears a striking resemblance to Mo Yuan. As they fall in love, they remain unaware of their true identities and the fated love story that binds them across three lifetimes and three worlds.