It tells about one episode of the civil war in South of Russia. Three friends Ilia, Tanya and Theodore learn that a secret counter-revolution organization led by a captain of the ship, Kleschuk, is hiding the considerable amount of treasure from the soviet government. Tanya makes it to the monastery where the friends think the treasure is kept. However, she is caught by Kleschuk. Meanwhile the red army surrounds the camp of the white army. Tanya escapes from the monastery and with her friends continues looking for the treasure. They find Kleschuk in the camp and get hold of the keys to his apartment where they find the treasure. In the end, the friends hand it over to the Soviet government.