In the ruins of the Temple of the Golden Peony, Mo Yeyan, the dreaded "Black Flames Demon," lives consumed by the fire of vengeance against the Crimson Heaven Sect. His spiritual barrier, insurmountable for all, is suddenly breached by Bai Ruyan, a Taoist of unwavering serenity and bearer of Lunar Qi. While a political conspiracy attempts to transform Mo Yeyan into a monster in the eyes of the world, he and Bai Ruyan discover that their union is the trigger for an ancient prophecy: the Final Cycle, where heaven and hell will converge and Chaos will awaken.