During the early War of Resistance Against Japan in Baiyangdian, Hebei, the Yanling Squad, led by Communist Party member Hei Lao Cai, conducted effective guerrilla warfare. Yang Xiaomei, fleeing abuse from her husband Zhang Jinlong, joined the squad and developed feelings for farmer Niu Dashi. Zhang Jinlong, unable to change, defected to the Japanese. As Japanese sweep operations intensified, Xiaomei, Dashi, and Zhang Jinlong faced different paths in the conflict.

It is a story about the Chinese police who intelligently and bravely fight with the cooperation of the factory's Party Committee and the masses, against the spies, who steal the navy's equipment "Hunting No.99".

Ling Yanzi exposes Cui Min as a newly born capitalist.

Unfortunate events beset a poor Chinese girl as she escapes from invading Japanese forces, narrowly avoids being raped, and seeks solace in a neighboring village.

In the 1950s, an army reconnaissance group finds an enemy spy organization lurking in a coastal town in southeast China intending to collect military intelligence.

During the civil war, the counterintelligence agencies of the Chinese People's Liberation Army fought against Kuomintang spies and saboteurs. Battles are already taking place in the suburbs of the city. Zhang Go-zhong, head of Kuomintang intelligence, following orders from his command, leaves a large group of saboteurs in the city. He hands over the lists of this sabotage group to the remaining resident, the major merchant Cui Xizheng. The PLA enters the city and establishes people's power. But the hidden enemy immediately begins to act.