Based on the popular fantasy novel “Three Lives Three Worlds, Ten Miles of Peach Blossoms,” ONCE UPON A TIME unfolds a tale of grand conflicts, intense emotions, and the compelling forces that propel both humans and deities toward vengeance, fidelity, and everlasting love. Bai Qian, a deity and ruler from the Celestial Realms, is dispatched to the human world to face a challenge that will elevate her to a High Goddess. During her time there, she encounters Ye Hua, with whom she falls in love and eventually marries. However, the reemergence of a former adversary puts everything she cherishes at risk.