The rebellion against the Kurian Occupation of Earth takes the offensive, with David Valentine leading a company of former Quisling soldiers on a raid against an enemy armory before joining forces with a guerilla army in the Appalachian Mountains. Valentine aims to establish a permanent outpost near the East Coast, believing it would provide a strategic victory over the Kurians. He suspects his old ally Ahn-Kha leads the guerillas, but his fighters are unprepared for the harsh realities of 'Winter Duty' and the Kurians' subsequent extermination order in the region.

The narrative follows Major David Valentine and his battalion as they transition from offensive operations to a desperate retreat and survival scenario. The story explores themes of military strategy, inter-group dynamics within a rebellion, and the harsh consequences of occupation and counter-insurgency. The shift in focus from establishing a foothold to enduring a brutal winter and facing an extermination order suggests a narrative arc that tests the resilience and adaptability of the protagonists. The progression from a strategic offensive to a fight for survival highlights the unpredictable nature of warfare and the high cost of freedom.