Paul Pospischiel loses his job in the great colliery collapse in the Ruhr, retrains and builds a new life for himself. One day, he receives a letter from his mother, which tears him from his comfort zone and triggers a serious conflict. She has discovered the man who sent his father to a concentration camp decades ago and is therefore responsible for his death. The mother demands accountability from this man. Paul decides to confront the suspected informer and murderer...