Grozdan Gertzov

Lord and Lady Glenarvan found a bottle in the ocean. This bottle contained a letter from Captain Grant that he and two of his sailors had survived a disaster at sea and need help. Unfortunately, the letter was damaged by water, and the latitude is known (37 degrees), but not the longitude. The Glenarvans decide to find Captain Grant.

Yana is a teacher. Her courage intrigued the German nobleman von Cheeter. Yana receives an order from the Soviet intelligence service to go to Berlin. There she finds herself in a society that shocks her with its arrogance, cynicism and nationalistic prejudices. After giving valuable information, the Gestapo seizes her. Yana is tortured but will not betray her friends.