The snow is falling in Chang'an, and the sword spikes are shaking lightly. The female swordsman Shen Qingci brought a "snow-shattering sword" to Beijing, just to find out the truth behind her brother's mysterious death. The silver ornament with the word "Yuan" engraved on the sword's tassel is the only clue.
When they first met Lu Jingyuan, the leader of the secret guards, he stared at the sword spike with a strange expression and said, "This sword spike should not be in your hands," and the two of them were involved in the undercurrent of the court. Some people asked her to hand over the sword to save her life, and some people were willing to fight against the imperial power for her. However, her brother's death was actually closely related to the "Snowy Night Unjust Case" that destroyed loyal ministers ten years ago.
Surrounded by snowy nights, secret letters and suspicions, and identities reversed, Shen Qingci searched for the truth on the tip of a knife, but found that Lu Jingyuan's secret was more difficult to guess than Chang Anxue - he was both the one who tracked her down, and the one who protected her. The sword is stained with snow, and love secretly arises. When the truth is revealed, should they fight against each other with swords, or should they guard the Chang'an wind and snow together?
