Qing Kou, a modern ordinary person, accidentally traveled through the Qing Dynasty and became an accounting spirit in Heshen's mansion who relied on the account books. If the account books were destroyed, she would be gone. At a critical moment, she meets Song Qing, who has also traveled through time. In order to find a way out of the crisis, the two work together to sneak into the accounting room to investigate corruption and explore the gunpowder warehouse to find foreign guns. In the thrilling whirlpool of power and intrigue, they gradually become partners who depend on each other for life and death.
When the curse of "He Shen fell, the account souls died" came, they narrowly escaped death at Caishikou, and finally broke through the constraints of time and space and returned to the modern era. From the ups and downs of the Qing Dynasty to the stable daily life of modern times, Qing Kou lost her vulnerability and confusion, learned to use a mobile phone, do work, and integrate into a new life. Song Qing was always by her side, teaching her to adapt and supporting her. From confessing at the beach to meeting parents and choosing a new home, the love between the two became more and more mellow in the smoke. Qing Kou also completed the transformation from a dependent account spirit to an independent, confident and capable modern woman, writing a healing love song that spans time and space.
