The concubine Xie Qingzhi is the most inconspicuous fifth girl in the Dingyuan Hou Mansion.
The biological mother was weak and the eldest sister was domineering, even the twenty taels of spice money every month was withheld. She hid a lot of poems and books, and her family's incense-making skills, all she wanted was to give her mother a good night's sleep in this deep courtyard.
Until that night, the regent Pei Heng fainted at the banquet in the Hou Mansion.
In his panic, his father thought of her - the concubine who once used a soothing incense to save her aunt.
She used her sense of smell to detect the murderous intent in the sachet and saved his life. He didn't ask her what reward she wanted, but only asked: "Don't you want a way to survive for yourself?"
She replied: "As long as my mother is alive, I will have a family."
From then on, the powerful "Living King of Hell" remembered this concubine.
He checked her, used her, and tested her; she avoided him, feared him, and resisted him.
A deal based on incense, two people who are accustomed to calculating people's hearts.
Until one day, he blocked a fatal knife for her and asked her: "Why should I take this risk?"
She was speechless.
He answered for her: "Because I have discovered that you are the only person in this world that I care about."
But she didn't know that her life experience, her family's incense tree, and the private seal of "Qinglian layman" had already involved her in an old case twenty years ago——
And the person who wanted to kill him was inextricably linked to her life experience.
Incense can soothe the mind, incense can be deadly, and incense can also bring trouble.
When the truth is revealed, are she and him enemies? Is it a friend? Or...
One stick of incense is enough time to fall in love with someone.
One burner of incense is enough to destroy a person.