In the twenty-sixth year of the Republic of China, Lucheng was turbulent, Japanese and puppet spies were rampant, and undercurrents from all parties were surging. Fu Qingyuan, the direct daughter of the Fu family, is one of the top incense makers in Lucheng. She is a skilled incense maker who is hard to find. She spends all day in the incense shop playing with flowers, herbs and spices. Looking at her delicate appearance, anyone would think that she is just a boudoir lady who can only guard the incense shop. No one knows that she is the core agent of the underground organization "Hanmei". The special fragrant pill is her code book, and a wisp of fragrant mist can convey top-secret information. Cheng Yanqiu, who was in charge of the military and political affairs in Lucheng, was known as the Living King of Hell. He was so decisive and cold-blooded in his killings that no one from the powerful to the common people dared to disobey him. Outsiders all know that he is a warlord who seeks to seduce others, but no one knows that he has secretly set up a trap and vowed to uncover the traitors and protect the people of the city. During a fragrant banquet at the Governor's Mansion, agents raided the underground party. Fu Qingyuan was in a dilemma because of the hidden information, and ran into the arms of Cheng Yanqiu. From then on, the two of them tested each other step by step. He suspected that her identity was not simple, and she was wary of the bottomless depths of his city. From tit-for-tat to walking side by side, from suspicion and precaution to sharing life and death, there is a sharp edge hidden in the mist, and deep affection wrapped in the smoke.
