Alyosha, along with friends Kapan and Sovoy, goes to visit his grandfather, forester Belaryov in the summer. One day the guys find a little roe, whose mother was shot by a poacher. The forester writes a letter to the district authorities. But the executive committee is closed because it is a weekend. Alyosha gives a letter to the familiar girl Nyusha. The letter falls into the hands of the girl's stepfather, the poacher who killed the roe deer. He tries to shift the blame on the forester. But then Nyusha goes to the police - The guys in the meantime tracks down and detains the poacher Kharpaev.