At the end of the 22nd century, detective Long Xiaoyi encountered a global catastrophe while on duty and hurriedly crashed into a planet in an escape capsule. At the moment of crisis, the consciousness merges with "Long Feiyun", the second son of the Minister of War of the Ming Dynasty who had just been hunted down and was seriously injured and on the verge of death. After waking up, he found that he had traveled to the last years of Hongwu in the Ming Dynasty.
Relying on modern criminal investigation thinking, management knowledge and extraordinary physique obtained due to the difference in gravity, he emerged as "Long Feiyun" in the security agency of Yingtianfu (Nanjing) and repeatedly solved strange cases. However, he soon discovered that there seemed to be an invisible giant network behind these cases, pointing to a mysterious organization called "Shadow Pavilion". During the investigation, he met Wang Yufei, a smart and courageous female medical officer with a mysterious life experience, and interacted with many women of different identities.
As the investigation deepens, clues vaguely point to the powerful King Zhu Di of Yan. Long Xiaoyi is in a dilemma: should he be loyal to the court and continue the investigation, or should he protect himself wisely? It seems that there are more secrets hidden behind it.
