Arne was employed by the Danish Defence Intelligence Service during the Cold War. He tells of how the service obtained information from the extremely closed Soviet Union. Mona was recruited by the service at the age of 30 and went to Poland with an experienced spy.

As a seasoned spy, Mona decides to take her husband and children on a trip to Poland under the guise of a family vacation. Many years later, she is excited about their reaction to her involving them in the risky mission. In 1987, Jens set off on trip no. 13. It was his last trip for the service.