Rains and the rest of the platoon are put through intensive training under the watchful eye of Major Jack Jones (Sean Bean), where their skills and endurance are pushed to the limit as they prepare for their first highly classified and dangerous mission: to parachute into occupied Norway and capture new radar technology from the Germans which could change the outcome of the war.

[Note 1] The newly formed band of brothers are joined in their task by Norwegian immigrant Steinar Mortensen (Aksel Hennie), now a US Marine Lieutenant with vital knowledge of the terrain, and beautiful spy Jensen (Izabella Miko).

All their lethal commando skills are put to the test as they attempt to escape fierce gun battles and attain the German radar technology.

To make things worse, the Germans catch up with them at the farm, bringing Corporal Brightling (Stephen Walters), who was captured alive during the earlier fire fight.

Jensen and radar specialist Roger Rollright (John Dagleish) are ordered to make a run for the Swedish border, while the rest of the commandos provide cover for them.