The border boat "Brave" detains a schooner off the coast of Kamchatka, on which Japanese spies are disguised as fishermen, and takes it in tow, leaving the sailor Kositsyn to observe. A strong storm is played out, the Japanese cut off the towing ropes. The schooner is thrown onto the rocks near the shore. Red Navy sailor Kositsyn and the detainees reach a deserted island. The most difficult task falls on Kositsyn: in the conditions of an uninhabited island, he is forced to guard seven Japanese spies from escaping without sleep and rest, without food and drink. With no hope of salvation, he nevertheless fulfills the duty of a Soviet border guard.—Bazza the Beast