In the middle of the Dajing Dynasty, there were surging undercurrents in the world. A hundred years ago, the "Zhenguowei" who protected the royal family died mysteriously, leaving only the "Star-Breaking Knife" that can cut gold and jade. It is said that the blade of the knife contains secrets that can subvert the world.
Shen Yan, a young man from the borderlands, was adopted by a hidden swordsman since he was a child, and he practiced sharp swordsmanship. However, due to a sudden massacre, he was forced to enter the world with half of his swordsmanship. He didn't know that the crescent-shaped birthmark on his back was the mark of a descendant of Zhenguo Wei.
On the way to trace the truth, Shen Yan was repeatedly hunted, but unexpectedly met Su Ningshuang, a saint of the demon sect who bears a blood feud, and Xie Linzhou, a seemingly cynical but resourceful son of an aristocratic family. From suspicion to companionship, the three of them uncovered layers of mystery amidst the flash of swords and swords: the powerful King of Zhenbei secretly colluded with the mysterious organization "Shadow Pavilion" in an attempt to seize the Star-Shattering Blade and control the world; and the destruction of the Zhenguo Guard a hundred years ago was actually closely related to a dust-shrouded secret of the royal family.
When the full picture of the Star-Breaking Blade gradually emerges, Shen Yan not only has to face the encirclement and suppression of good and evil in the world, but also has to make a choice between family affection, morality and the righteousness of his family and country. The shadow of the knife cuts through the long night, and what the young man's blade points to is the core of the conspiracy and his destiny.
