December 1942. Two young soldiers leave there post's at check-point 83 i North Värmland, Sweden and make there way through the ice cold winter-night towards Nazi-occupied Norways border. Sweden stands on the brink of invasion and they want to see the enemy everybody's talking about. But the adventure ends in disaster and the day after Lieutenant Aron Stenström finds out that his brother Sven is one of the missing soldiers. With the odds against him he is forced to go behind enemy lines, on a secret rescue mission. And deep in the Norwegian forest Aron realizes that a completely different kind of line must be crossed if they're to come out alive.