1941 Amsterdam is occupied by the Nazis. Professor Joseph Held understands that now his hometown is in the grip of a destructive force that destroys everything in its path, which knows neither pity nor compassion. And, it would seem, Held has no choice but to submit to the new regime, stepping over himself. To do what most do is to silently accept your fate. But faced with Nazi tyranny, Held can no longer turn a blind eye. One of his students, Michael Blum, aroused the interest of the Gestapo. A naive young man whose only guilt is that he was born a Jew. Held decides to hide Michael in his attic. The young man tells the professor about his dreams, about his beautiful and fearless girlfriend Elka. Michael is sure that even war will not separate them. Josef sees the determination in the eyes of his young friend, his desperate thirst to live, Held understands that he is obliged to help him. But one day Josef finds himself faced with an impossible choice. In the dark days of war, when danger and betrayal lurk around every corner, no one can be trusted. Michael's life will depend on Josef. Professor Held will have to find the hero within himself and do everything possible to keep Michael alive. Even if he has to put his own life in mortal danger.