1944 Great Patriotic War. During the offensive, our soldiers find a wounded soldier on the front line. He is dressed in a uniform without insignia, and because of a severe concussion, he does not remember anything. A check in the Special Department shows that this is a reconnaissance major Egor Petrov, who a week ago, as part of a reconnaissance group, went on a mission and returned alone. Petrov is appointed commander of an engineering and sanitary company, which is called "dog" in the common people - dogs and their instructors serve there. The commander of the girl's platoon, Captain Ekaterina Golikova, takes hostility to Egor's appearance. And there are reasons for this.
