Adapted from the novel of the same name by Gong Keyi. In a certain animal husbandry brigade in Inner Mongolia, a batch of military horses is to be selected for the People's Liberation Army. The brigade leader intends to assign the task to Li Mantang, a hidden historical counter-revolutionary. Educated youth Yu Hong and others take the initiative to shoulder the responsibility of taming these fierce horses. Because of this, Li Mantang harbors resentment toward the educated youth and deliberately causes a horse-startling accident to undermine their unity. With the help of the Party branch, Yu Hong and her comrades in the women's horse-herding squad uncover Li Mantang's scheme. Through investigation, they finally expose this counter-revolutionary, thereby educating the deceived brigade leader and the young educated youth Xiao Liu.