Ye Kele, an unlucky man running his father’s tea shop, is drawn into a mysterious murder linked to a unique perfume. As he aids the investigation, he meets Ruo Ye, a young Japanese woman, and begins unraveling clues that lead to the royal palace. Using his sharp sense of smell and with Ruo Ye’s help, Ye Kele works to uncover the truth behind the crime and clear the name of an innocent princess.