Two teenagers Marco and Lyuda are helping border guards to catch a spy.
Irina Mitsik
as Lyuda
Vladimir Kislenko
as Marco
Иван Рыжов
as Очерет
Геннадий Юхтин
as Red-bearded
Виктор Мирошниченко
as Levko
Seryozha Krivoshlykov
as Gritsko
Tatyana Fateeva
as Katya
Дмитро Франько
as Kovalchuk
Vitold Janpavlis
as unknown
Andrey Derevyanko
as "Akula"
Sofya Karamash
as mother of Mark and Gritska
Олег Мокшанцев
as diversant - kapitan mini-podlodki
