The director of the post office, Paul, is a passionate stamp collector. In his collection, he has many valuable stamps dating from different periods. Some of them are very old and rare, even unique, which means that their value is very big on the stamps market. However, unfortunately, Paul was a target of thieves that have somehow entered his home and made a robbery. He has reported a robbery of stamps to the police so how it is their turn to investigate what has happened and who is responsible for the robbery.