Jin Zhilie and Zhang Qi are in love between teachers and students. Jin Zhilie is a professor at Hua Fu University, and Zhang Qi is a student in the Physics Department of Hua Fu University, so they are teachers and students. The story takes 1937- 1945 as the main line, and tells the choices and sacrifices made by two generations of three intellectual families in Beiping in the face of great turmoil and great changes in the times. Some people choose to protect Chinese culture and continue the cultural blood, while others choose to join the army and save the country with guns. They are indomitable and indomitable idealists, but also realists. They tried their best to save the nation, actively explored the way out of the country, and finally moved towards the light.