"Smiling corpses" appear one after another in Linjiang Mansion, and the deceased all have strange smiles on their faces. Song Qingyun, the former head of the Criminal Department, was demoted to this position. He wanted to lay down on his body, but he was "touched" by a corpse that suddenly fell into his arms. Su Banxia, a daughter of a drug store, holds key clues, but chooses to solve the case on her own because "this government is not good enough". When a "venomous straight man" meets a "pharmacological guru", the two form a "cleansing society" to use science to break metaphysics and make a fortune by doing autopsy. As the investigation deepened, they discovered that each corpse was a medicinal reference, pointing to the palace secret recipe stolen twenty years ago...
