Yu Qing is a descendant of the Yu family in Jiangnan. He was born with an extraordinary sense of smell. However, due to his special constitution, he cannot tolerate most spices and can only develop light fragrances. He is ridiculed by the industry as a "smellless man".
- **Iron-faced Judge**: Yu Chizhao is the commander of the Iron-faced Prison Department of the Ministry of Punishment. He hated the aroma because he witnessed the massacre of spice explosions when he was a child. His ruthless and ruthless methods in handling cases are known as the "Iron-faced Hell".
- **Intersection of Destinies**: There is a mysterious explosion in the palace incense warehouse. Yu Qing is falsely accused of being the mastermind. Yuchi Zhao is ordered to investigate the case. The two meet for the first time in prison, but their prejudices against each other change due to an accident.
- **Secret in the Fragrance**: Yu Qing discovered traces of "carbonic acid incense" remaining at the explosion site. This was a lost secret technique of the Yu family. The two were forced to cooperate in the investigation and uncover a larger conspiracy behind it.
- **Complementary Growth**: Yu Chi Zhao overcame his fear of aroma with the help of Yu Qing, while Yu Qing learned to be strong from Yu Chi Zhao, and the two worked together to perfect the "Carbonic Law" fragrance recipe.
- **Ultimate Showdown**: The mastermind behind the scenes - Lin Shijie, the supervisor of the Fragrance Bureau, attempted to control the royal family by using carbonated incense prescriptions. The two teamed up to defeat the conspiracy. Yu Qing used incense to redress the unjust case, while Yu Chizhao eliminated the corruption of fragrant medicine in the imperial court.
Purpose: "Carrying the road with incense leads to the same destination through different paths - when the righteousness of the 'Iron-faced Yama' meets the flexibility of the 'Bottleless Son', two completely different lives redeem each other in the process of pursuing the truth, and finally realize that the real power lies not in control or confrontation, but in acceptance and balance."