The Secret of the Wolf's Maw

Тайна «Волчьей пасти» (original title)

Synopsis

A boy named Vitya arrives with his parents at a military base on the seashore. While his father is scoping out potential terrorist attacks, Vitya makes new friends – guys from the military town – and an enemy in the form of the leader of the local hooligans. In an abandoned mine shaft, where submarines used to dock, they accidentally discover explosives hidden by terrorists.