They say that the old church in the remote village of Sinerechye hides countless treasures. Four inseparable friends have known about this since childhood, but all their attempts to find the mysterious underground passage ended in nothing. And now the guys become aware of his scheme. But what does it mean? How to understand the intricacies of lines and squares? Wow a task! Maybe the entrance to the dungeon is hidden by an ancient crypt? The guys go to the cemetery at night and see that they are ahead of a mysterious competitor...