A Vow in the Dark unveils a sweeping saga ignited by an ancient conflict. Three centuries after an immortal fairy, Jin Li, successfully sealed the formidable Demon Lord Jie Chuan, fate intervenes once more. A celestial beast, also named Jin Li, unknowingly unleashes him, leading to her capture and transport to the ominous Demon Realm, where her rare power becomes a prized asset. What initially binds them is hostility, a deep-seated enmity between two beings seemingly destined to clash. Yet, amidst this conflict, an unexpected and powerful love begins to blossom, transcending their inherent differences. Their burgeoning connection faces a devastating challenge when a shocking truth about the celestial beast Jin Li's true origin emerges, threatening to shatter their bond, rewrite their interwoven destinies, and plunge them into an even greater struggle for their future.
Other names: Lian Lian Feng Ling Du, 戀戀風陵渡, Love Paradise