Norwegian Kirsten Brun, a Nazi resister, has one mission: destroy the installation that produces the chemicals Germany needs for an atomic weapon. Unfortunately, her first attempt fails, leaving her injured and unconscious in the Arctic snow.

The Indigenous Sami people have tried to remain outside the conflict, but when Marrit Ragnar and the reindeer she herds discover Kristen and save her life, joining the battle is inevitable. A misfit in her own culture, Marrit participates in the second destruction attempt in order to avenge the killing of her family.

Kirsten's and Marrit's feelings for each other grow deeper, but each attack they join is costly in blood and conscience and nearly tears them apart. Should they carry on with the carnage for a questionable cause, or retreat north with the gentle reindeer?