Jiang Lai, who had been raised by the Jiang family for twenty years, was actually a child swapped at birth by a nanny. Their biological daughter, Lin Zhien, had grown up running a traditional folk-custom incense shop and had become deeply knowledgeable about traditional folk culture, environmental arrangements, and resolving folk-related disputes. After reuniting with her birth family, she faced criticism because of her work in folk traditions. Faithfully following her master's instructions, she guides her impulsive junior brother, resolves various difficult cases involving folk customs, and investigates an illegal gang in Huaizhou. Eventually, she exposes the schemes of Feng Kui and his accomplices, who exploit folk traditions as a cover to make money and harm people, dismantles their criminal hideout, and changes everyone's perception of her through her own abilities.