Zhu Qiao, a poison doctor who is good at using strange poisons and antidotes, encounters Cen Yi, a military general stationed at the border, in a series of mysteries in the martial arts world. The two work together to investigate old cases that have been covered up. Zhu Qiao relied on the rare herbs and clues and evidence stored in his personal space to deduce the details of the murder using pharmacology. Cen Yi relied on the meticulous thinking gained from battlefield experience to assist in the investigation, and finally joined forces to uncover the secret conspiracy that spanned the martial arts world and the border army, and maintained peace.
