Ye Shuang, a modern medical genius, traveled to ancient times where wars were frequent and became Ye Shuang, a doctor disguised as a man. With her superb medical skills and modern knowledge, she rescued wealthy businessmen in the black market and treated powerful people in the court. However, she was hunted down because she refused to be controlled by the powerful. On the way to escape, she met Lin Wu, a like-minded engineering genius who had been demoted. The two worked together to establish a medical and infrastructure system in a barren land, gradually changing local people's livelihood from improving farm tools, popularizing health knowledge to building water conservancy projects. However, their progress touched the interests of local powerful people and conservatives in the court, and they faced many obstacles. When the plague breaks out and war approaches, Ye Shuang must complete the construction of the medical system within a limited time, while facing multiple challenges such as identity exposure, emotional entanglements, and power struggles. In the end, she not only saved countless lives with her medical skills and wisdom, but also promoted changes in the entire society and became a key figure in changing the times.