Basel (John Mills John Mills) is the newly appointed commander of the Mountain Infantry Regiment, a serious and serious man who decides to clean up the lazy habits in the army as soon as he takes office. Before the arrival of Basel, the life of the infantry regiment was idle and comfortable. Lieutenant Colonel Kleisin (Alec Guinness Alec Guinness) lived like a fish in water, but now it is different, which makes Kleisin very unhappy. Although on the surface, Kleisin agreed with the decisions made by Basel, behind his back, he kept inciting his subordinates to complain and discontent about Basel. One day, Kleisin found that his subordinates were seducing his daughter behind his back, and Kleisin, who was carried away by anger, beat up the ignorant boy.