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".
In the mid-1950s Henan countryside, communist youth league member Xian Yue responds to the call of the county committee, signing up to participate in the youth commando team, as do the little sisters. Laoxin Yue and other elders firmly oppose the women going up the mountain, think it it is nonsense, unlucky and so on. In response to the feudal remnants of the discussion, Xian Yue does not compromise, carrying out a face-to-face struggle and eventually leading the commando members up the mountain.
