Beiyuan Country is the most prosperous and peaceful country among the four countries. It has the lowest crime rate because of its best crime-solving methods in the world.
Feng Yaner, the daughter of the minister of Dali Temple, has been obsessed with investigating crimes since she was a child. She often disguises herself as a man and sneaks into crime scenes. With her eccentric mind and extraordinary courage, she has become famous in the capital.
Li Hao, the Imperial Master of Beiyuan, was one person below ten thousand people. He was born with a demonic appearance, cold and cold on the surface, but in fact he had a vicious belly, a vicious tongue, and a vengeance. No one knew that this powerful national advisor was the only survivor of the Shen family's massacre twenty years ago.
A seemingly ordinary case of theft of a gold hairpin accidentally involved Feng Yaner in an old case. She and Li Hao had their first confrontation at the crime scene, and they formed an indissoluble bond from then on.
Serial murder cases, fraud in imperial examinations, loss of money from the treasury, secrets of the palace... Mysteries come one after another, and the truth of twenty years ago slowly emerges like a cocoon.
Murong Fei, the young prince of Xiyuan, is gentle and considerate like a spring breeze, silently guarding but will eventually let go; Wang Yu, the young prime minister, is in a deep city and does whatever it takes to achieve his goals, and finally sacrifices his life; Shen Yingyue, the most talented woman, has tried her best because of love and hatred, but in the end she cannot get that person to look back.
This is an arduous journey about truth and revenge, and it is also an unparalleled love that begins with solving a case and ends with heartbreak.
——The most touching love words in the world are not "I love you", but "I will accompany you to find out the truth."
