Zhou Mingying, a worker at a power plant in Northeast China, united her fellow workers under the leadership of the Party, overcame all difficulties, demonstrated a high degree of creativity, exposed the enemy's plots and sabotage, and quickly repaired the generators that had been damaged by the Kuomintang, ensuring the supply of electricity.

In 1948, after the Northeast was liberated, enemy sabotage began. The Public Security Bureau learned that spy Li Tianmin had infiltrated the city. Bureau chief and Captain Zhang quickly deployed personnel to capture him. Li Tianmin evaded key questions during interrogation. Clues were found on a milk bottle cap delivered by a boy, who passed it to another spy, Zhou Shaomei. Under surveillance, Zhou Shaomei, fearing Li Tianmin’s capture, killed the boy to erase evidence. Intelligence personnel mobilised the masses, pressuring the hidden enemies. Many deceived individuals provided clues, ensnaring the enemies in the people’s war.

Liu Hulan (1932-1947) was a young female spy during the Chinese Civil War between the Guomindang and the Communist Party and stood for Communist. She was born in Yunzhouxi village, in the Wenshui County of the Shanxi province. She joined the Communist Party in 1946 and proceeded to become the secretary of the All-China Women's Federation. She was actively involved in collecting support for the Communist Party of China from the villagers of Yunzhouxi. This is a dramatization of her life.