As the resistance group takes more risks during its operations, Johan discovers there is a traitor among them. Meanwhile, the British are preparing a rescue operation that ultimately went horribly wrong on the morning of March 3, 1945.

June 1944. Allied troops have landed in Normandy and are fighting in France. A group of seven Dutch resistance fighters is given an important mission to help the Allied advance. However, the mission goes completely wrong and while the resistance fighters regroup at their hiding place, they begin to suspect that there is a traitor in their midst.