Brothers Dimka and Leshka Obolensky fell into the hands of a mysterious note, deciphering which you can find a real treasure! You also need to find out the secret of the note because it is the key to the scandalous theft that occurred at the boys’ school. The young detectives went to the village of Chernodubovo to find a clue, but suddenly some suspicious characters got involved in the game. Their affairs are also connected with this strange story...