With the college entrance examination approaching, top student Li Zhizhi accidentally hits a girl playing downstairs with a falling object. Facing her family's eager expectations, Li Zhizhi choses to conceal the incident. Unexpectedly, her parents already know about the incidient. The three members of the family keep it a secret from each other, turning the accident into ridiculous farce.

The story of the Northeast Anti-Japanese Allied Forces' rearguard regiment's breakout, reorganization and return to the Northeast battlefield from 1938 to 1945.