During the Yongle period, the Ming Dynasty was prosperous on the surface, but there were constant turmoil in the dark. Song Yan, the new top scholar, became the core of the investigation with his insight into people's minds. However, in a strange case, he was accidentally bound to Chang Ling, the hereditary prince and commander of the Imperial Guard. Chang Ling's unparalleled martial arts skills and decisive actions perfectly complemented Song Yan's meticulous writing.
The smart and cunning Princess Zhu Luoning joins with the resources of the royal family. She has many connections and can always break open the gap in the deadlock. Her interaction with Song Yan hides the joy of youthful spirit; Shangguan Ci'an, a down-and-out talented girl, uses her delicate thoughts and talents to help break the situation. Her gentle gaze on Chang Ling is hidden in the chess, calligraphy and painting, and her cold appearance hides her tenacity.
The four-person team formed a team to unravel the cocoon in the confusion of power struggle and Jianghu conspiracy. From the murder case in the official secret room to the secrets involving the country, they use wisdom to solve the situation, use force to escort, and develop feelings amidst the light and shadow of the sword. When the conspiracy points to the depths, the four emotions are intertwined with the righteousness of family and country, and together they compose a bloody legend in the Ming Dynasty.
