Nanking, 1937. Hamburg businessman John Rabe has lived with his wife Dora in the former Chinese capital for almost thirty years. He is head of the local branch of Siemens and due to return to Berlin. But he's reluctant to leave - he has formed a real bond to the country and its people. When during his farewell party Nanking is bombed by the Japanese, the whole town is in panic. Rabe opens the doors of the company's compound to provide refuge for his workers and their families. German-Jewish diplomat Dr. Rosen suggests that a security zone be set up for Chinese civilians. John Rabe is appointed chairperson of Nanking's security zone. The Japanese army cracks down on the Chinese civilians population with astonishing brutality. However, Rabe and his comrades-in-arms succeed in wresting the planned security zone from the Japanese. Hundreds of thousands of people flee into the zone. Finally, the Japanese make use of a pretext in order to attack the zone – a race against time begins…