In Quanzhou during the Southern Song Dynasty, Shen Mo, the inspector of the city's fragrant medicine warehouse, a technical clerk who only knew how to deal with spices, was suddenly involved in a huge disaster: the top-grade ambergris prepared for tribute in the warehouse was replaced with a fake. The superior gave him a seven-day deadline to make amends, otherwise the department would punish him as "deceiving the emperor."
In search of the true fragrance, Shen Mo was forced to step into the bizarre black market at the port, but accidentally came across clues about an unsolved smuggling case three years ago. He discovered that the sudden death of his predecessor, the disappearance of his colleagues, the superior's warning, and the transactions of the mysterious businessman were all closely related to the "incense" in his hand.
The seven-day limit is not only a countdown to finding fragrance, but also a countdown to life. Amid systematic corruption and lies, the professional skills that Shen Mo relies on for survival have become his last weapon and prison. He must use his nose to distinguish between true and false, and more importantly, his conscience to distinguish between good and evil - whether to become a silent part of the system and secure his position; or as a spark, plunge into the grease-soaked darkness, risking everything to fight for justice for those silent ashes.
This is the life and death adventure of a small official caught in the cracks of history, using a craft to fight against the entire system. The spices will burn out and the truth will be covered up, but the fragrance will linger and justice will always be in the hearts of the people.