Shen Zhe, a graduate student in the Department of History, traveled through time to become the son-in-law of the Su family of the Great Yan Dynasty. He discovered that his father-in-law's family were all time travellers, and they wanted to transform the dynasty with modern skills in industry, agriculture, finance, and military. Shen Zhe hid his identity and used historical knowledge to help the Su family avoid the risks of imperial power and noble clan many times. Later, he revealed his identity as a fellow countryman and led the Su family to plan to support Zhao Shuo, King of Yan.
