Qianhua established the country, Confucianism and Confucianism established the dynasty, the housekeepers suppressed the government, and hundreds of undercurrents surged; in the north, Kanshuo barbarians were watching, the Tibetan Li Rong conspired to disrupt the situation secretly, and murderous intent was everywhere inside and outside the court.
Shen Yan, a young man from a poor family, armed with forbearance and wisdom, stepped into the most secretive sword in the imperial city - Si Qianwei, starting from the humblest level as a mysterious detective. One after another, bizarre and unsolved cases come one after another, with clues hidden in the secrets of the city, corruption in the court, the secrets of aristocratic families, the enemy's secret operations, and the conspiracy at the border.
He solved the puzzle with meticulous thinking, used the exquisite city to deal with the Confucian and Legalist factions, and joined hands with the passionate brothers to break the situation; he investigated hidden connections, uncovered traitors, and eliminated hidden dangers. He climbed up the ladder step by step in the shadow of swords and swords, from being an unknown spy to being in charge of the imperial city's criminal investigation, and then stirring up the power of the government and the opposition.
There is conspiracy in the case, and the fate of the country is hidden in the bureau. When the war between the north and the south is about to break out, the game of hundreds of families reaches its peak. Shen Yan wields the sharp blade of the dark night. While clearing out the traitors in the court, he protects the mountains and rivers thousands of miles away. With his own efforts, he solves mysterious cases, decides the court situation, and fends off powerful enemies. From the smallest dust, he becomes the most unshakable dark night backbone of the Qianhua Dynasty!
