And events taking place during the period when the Germans occupied Holland, the film shows the war through the eyes of two boys. Tuur son is intelligent but disruptive of a family of liberals who keep their heads down and support the resistance in secret; His best friend is Lambert, a boy who comes from a family of collaborators. Besides the differences of political views which they have families, their relationship of friendship is even more confusing when the equation comes a mysterious girl named Maartje. This befriends both, but chooses to tell a secret just one of them. What is her secret and why it testifies only one? This threatens to destroy their friendship.