Paul and Adèle were once lovers and separated but are still good friends, one year after everything seems to take them away from each other. The key of E-flat may be the key of true friendship, but it is Mozart that pushes them apart...

North of Italy, the von Kettens dispute the forces of the Episcopate of Trent. Herr Ketten seeks marriage in a distant country, Portugal. After their honeymoon journey back home, Ketten leaves again for the war. Eleven years elapsed… Rumours are running about the presence of that 'foreigner' in the castle. Some say she's a heretic. Until one day, the Bishop of Trento ends up dying and, with the signature of peace, falls the background of von Ketten's life. Will the Portuguese win, where death seems to be moving in?

Two film directors and a writer are in Portugal for an expedition through various images, moments from the history of Western allegorical representation. The writer is Jean-Louis Schefer, and this tale encapsulates his life’s mission.