Copenhagen, 1944. A young idealist codenamed Flame and tense family man Citron are two Resistance fighters who become the underground's most proficient killers of collaborators and sympathizers. The Nazi SS is hunting them. They trust only each other. But in a time where fear and mercy must live in the shadows, a mysterious woman and a new assignment to assassinate the head of the Gestapo may lead them to the deadliest place of all. Based on the Holder Danske's most famous agents.