The film tells about the fighting everyday life of the crew of self-propelled guns during the liberation of Right-Bank Ukraine. Junior Lieutenant Maleshkin, an unshooted graduate of the school, commands the crew of the self-propelled gun SU-100. All the subordinates of Maleshkin are older than him and much more experienced. The authority of the young commander is tested at every step, he quarrels, then reconciles with his crew. In addition, Maleshkin is very dissatisfied with the battery comman...