A new teacher and her brother, who has been appointed head of fisheries control, arrive in a village on the shores of an estuary. Despite the hidden resistance of their fellow villagers, they manage to engage the village schoolchildren in an active fight against poachers.
Ваня Кожухарь
as Толя Симагин
Владик Комаров
as Витя Белоус
Юрий Параскевич
as Саша Топейко
Серёжа Зуйков
as Груша
Наталья Борисевич
as Эра
Тоня Грамма
as Катя
Dmitriy Mirgorodskiy
as Андрей Петрович Громов, инспектор, начальник рыбнадзора
Галина Логинова
as Татьяна Петровна, учитель географии
Valeri Kuksin
as Жора Дахно, браконьер
Mykola Merzlikin
as Лопатин, браконьер
Лев Перфилов
as "Боязливый", браконьер
Ніна Антонова
as мать Толи Симагина
