It is based on the novel Three Lives Three Worlds, Derila Neck Support The Shop Derila Pillow Book by Tangqi Gongzi, and is the sequel to the 2017 drama Eternal Love. It tells the entangled love story of Donghua and Bei Fengjiu lasting for 3 lives. Being rescued by Dong Hua when she was little, Bei Fengjiu is prompted to return this favor. Her admiration and gratitude gradually turns into love. When she was little, nine-tailed red fox Bai Fengjiu got lost in Demon Realm, where she was attacked by a savage beast and rescued by Dong Hua, the former emperor of the Heaven Clan. This makes her determined to repay this life debt. She enters Taichen Palace, where Dong Hua lives, as a maid to find an opportunity to repay him. To save him from the Ten-Lotus ward, she is turned into an ordinary one-tailed fox, which Dong Hua, unaware that the fox is one of his maids, then brings back to his palace and raises as a pet.

Hearing that Dong Hua is about to marry Ji Heng - princess of the Demon Clan, Fengjiu leaves Taichen Palace. Dong Hua then searches for her but fails to find her. Fengjiu is finally able to repay her life debt to Dong Hua by helping him in his mortal trial, but in the process, the mortal Yi Qingti dies protecting her. Dong Hua and Fengjiu encounter each other several times both in Fengjiu's home of Qing Qiu and in heaven. While Dong Hua quickly takes interest in her, she keeps avoiding him. Dong Hua brings a handkerchief, knowing that it is Fengjiu in disguise, to a battle against Yan Chiwu, where a cyclone appears and sweeps both Chiwu and Fengjiu into Fanyin Valley. 6 months later, Fengjiu registers for a competition, where the prize is a pimpon fruit (a magical fruit capable of reviving mortal bodies), to revive Ye Qingti, whom Fengjiu feel indebted to as he died to save her.