A three-hander about a fictional meeting between the physicists Niels Bohr and Werner Heisenberg. In 1924 Heisenberg, a German, went to Copenhagen to live and work with Bohr on quantum theories. In 1941 Denmark was occupied by Germany and Bohr was fearful for his life and work. Heisenberg was helping develop atomic energy and went to see Bohr in Copenhagen. The third character is Bohr's wife Margrethe.