The modern youth's soul travels back to Dou Qiujiu, a young boy from a rundown village in Korea during the late Warring States period. At the beginning, he was unjustly imprisoned and found himself in a dead end. Living in the troubled times of the Qin Dynasty with strict laws, he relied on modern criminal investigation thinking to solve the mystery of the murder of a noble and uncover the real culprit behind the scenes. In a desperate situation, he proved his innocence and got rid of the shackles of death penalty. He also had the opportunity to change his name and identity, and got rid of the shackles of his original family. He relied on Qin Law to plan step by step and counterattacked and grew up in the gap between the court and the bottom.