Li Ming, a city planner, transmigrates to the Zhenguan era after an accident at a construction site and becomes an ordinary junior official in Chang'an. An expert in modern urban planning and project management, he discovers that the drainage system in this world capital is severely clogged, the streets are a quagmire, and the people are suffering. Faced with obstruction from conservative officials and a lack of funding, Li Ming draws on his solid professional expertise and exceptional people skills. Starting with the renovation of a single sewer, he gradually wins the people's support. When Li Shimin sees with his own eyes how the newly renovated streets have been transformed, this "infrastructure fanatic" from the future is summoned to the imperial court, and a grand new chapter in urban reform begins.
