Den mørke våren

On 9 April 1940, Norway is occupied by Hitler's Germany. In the weeks that follow, there are several skirmishes between the occupying power and Norwegian forces. One of the drivers on the Norwegian side is called Henry Oliver Rinnan. Quite quickly, Rinnan finds out that he sympathizes with the German armed forces, and already in June 1940 he reports to German service as a secret agent. Rinnan will prove to be one of the most effective defectors during the war. How was that possible?