Shen Ying, a criminal officer of the Song Dynasty, and Pei Yan, a colleague of the "Crazy Pirates", teamed up to solve a series of strange cases. From the steaming of bones in front of the emperor to examine the imperial edict to the poisonous ink marriage certificate in Jinmingchi, the whole process was highly capable. When the truth about the usurpation of the throne was revealed in the vinegar vat, Arsenic wrote a heart-warming love letter. Finally, in the broken cup on the wedding night, he found the porcelain bottom engraved with the list of the deceased in the twelve-year unjust case - it turned out that Pei Yan had already imprinted the names of each deceased into the betrothal gift, and every case Shen Ying handled was a closed loop of redemption carefully designed by him. This pair of happy enemies, "one dared to feed poison and the other dared to swallow", used autopsy techniques to fall in love, used incriminating porcelain as betrothal gifts, and pieced together the missing half of each other's lives in a series of cases.