In the fourteenth year of Tianbao, it was the eve of the Anshi Rebellion.
On the surface, Chang'an City is singing and dancing peacefully, but in fact, there is an undercurrent.
Shen Changan, the last survivor of the Shen family, became a lawyer incognito. The father's injustice has not been resolved, but the conspiracy of the mysterious organization "Night Owl" has quietly arrived - they want to break the century-old seal and release the sleeping "city soul".
The prince's disappearance, the Shangyuan Lantern Festival massacre, and the violent death of Hu Shang... Five major mysteries happened one after another, and each one pointed to the same truth.
Shen Changan was forced to join the investigation and formed detective partners with Pei Yanran, a widower of Dali Temple, and Ashina, a Persian businessman. They want to uncover the deepest secrets of Chang'an City before the Tang Dynasty overthrows.
On the surface it is a detective story, but behind the scenes there is intrigue, and at the deepest level it is the revenge of a thousand-year-old spirit.
Purpose: In a troubled world where truth and lies intertwine, it takes courage to uphold justice.
And what's more difficult than courage is choosing to believe.