Set in 1953, spies plan to set off a explosion on the National Day.

The story of village children in the 1930s who do their part to help overthrow the White forces in semi-feudal China and bring the Reds to power.

Two old comrades who fought side by side on the battlefield are now working on the railway front after liberation. They clash due to differences in ideas and management methods. In the end, they learn from the advanced ideas of the Soviet Union to defeat conservative old ideas.