In the thirteenth year of Yongle, three bizarre murders occurred in Yingtian Mansion. Each of the deceased had a bright red cinnabar mole on his chest. There was no sign of struggle at the scene, as if he had been "seduced for life". Shen Yanqiu, editor of the Hanlin Academy, has a reputation as a "nerd", but he has hidden forensic skills inherited from his family. He was "assigned" by his superiors to assist in the investigation of an old case; Su Jiu, a police officer from Shuntian Prefecture, looks like a rough and neat young man, but is actually Su Jiuniang, who disguises herself as a man to investigate the unjust case of her brother. She is the best in Qinggong and tracking skills in the city. The first collaboration between the two was full of excitement. One relied on "touching corpses" to find clues, and the other relied on "running and breaking legs" to investigate traces. However, they discovered in the process that the cinnabar mole case was vaguely connected to the "collaboration" case of brother Su Jiu three years ago and the old "corruption" case of Shen Yanqiu's father. As more victims appear, mysterious men in green shirts, strange witchcraft talismans, and missing treasury treasures surface one after another. The two go from trying to undermine each other to fighting side by side. They must not only solve the series of mysteries in front of them, but also fight against the huge forces in the dark. They must also keep the unspeakable trust and bond in their hearts amidst the murderous plots—— After all, in the gap between the world of the Ming Dynasty and the officialdom, apart from the knife and the autopsy knife in his hand, the only one who can be relied on is the "unreliable" partner beside him.
