Based on the novel of the same name by Owen Sheers, Resistance is the story of a Nazi invasion of Britain during 1944. It follows the lives of a group of women living in an isolated Welsh village who wake up to find that their husbands have mysteriously disappeared. Presuming that their men have joined the resistance, the women can only wait desperately for news.

When a German patrol arrives in the area, the women are forced into an uneasy cooperation with the soldiers which eventually develops into a mutual dependency. Much later the women will have to reflect on the uncomfortable consequences of their actions.

Iwan plays George Bowen, a young man recruited as a spy, by a mysterious intelligence officer apparently called Tommy Atkins, played by Michael Sheen.