en Cuevana 3. Major Bert Harkus takes over the artillery regiment in Jesnack after graduating from the military academy. The troop proudly presents itself during an exercise. But apart from some good results in shooting, Harkus soon realizes that there are a few problems. As he does not believe that constant combat readiness is guaranteed, he orders far-reaching changes and does not only make friends. Only gradually do the troops pull themselves together.