A group of German teenagers arrive in Ardèche in the summer of 1982. They meet their French host families, and they are supposed to create a French-German play, in the context of the political effort to building a close and trusting French-German relationship. Instead, they find a dark and well-kept secret that leads us back into the last time a group of Germans arrived in the small town, back then in uniforms. The young people draw their parents and teachers into their adventure, as their helpers and antagonists. When the local secret is finally revealed, everyone’s world is turned upside down.