At the Setting Sun Inn in the frontier fortress, Liu Fuyan, the former demon sect saint, encounters Chu Linyuan, the son of the martial arts leader who was seriously injured. He went undercover to investigate the case under a pseudonym, while she concealed her identity and worked around the situation. The two were originally on opposite sides, but they were forced to join forces due to the conspiracy of the Imperial Court Zhenwu Division.
Chu Linyuan laughed at her for hiding her edge, but his heart was moved when she was drunk and showed off the secret knowledge of the demon sect; Liu Fuyan was suspicious of his purpose, but let down her guard when he sacrificed her life to protect her. From temptation to trust, from bickering to deep affection, they gradually fell in love amidst the flash of swords and swords, but they were shocked to realize that the blood feud between their parents - her father's death was closely related to his master.
The labels of good and evil are like shackles, and the conspiracy of the world is like a snare. When the iron hooves of the Zhenwu Division shattered the tranquility of the border, and when the grudges of the martial arts intertwined with the court's calculations, the happy enemies stood with swords in hand, splitting the fog in the wind and sand. Is it to continue the hatred, or to go through the smoke together? The past is hidden in the light of the sword, and each other is reflected in the eyes. They will eventually find their own path in the world between good and evil.
