In November 1939, after planting a home-made bomb inside a column of a Munich bierkeller, Georg Elser attempts to cross into neutral Switzerland but is caught at the border. His bomb detonates but misses killing German leader Adolf Hitler by just 13 minutes. The German security services find incriminating evidence on Elser and link him to the assassination attempt. They believe Elser must have been working with a group of conspirators and proceed to torture Elser. They also round up members of his family from his home village, including Else Härlen, a married woman Elser has been seeing. When Else is brought before Elser, he fears for her life and tells Kripopolice chiefArthur Nebe and Gestapo head Heinrich Müller that he acted alone, procuring detonators from a steel factory and stealing dynamite from a nearby quarry. He outlines the two clockwork mechanisms he built to time the explosion and hopefully kill Hitler as he made a speech. Still not believed to have attempted the assassination alone, Elser is once more tortured using drugs, but with the same result as before—he insists that he acted alone. Through flashbacks it is learned that Elser came to despise the Nazis and saw that Hitler needed to be removed to save Germany. Following his arrest, Elser was kept in concentration camps for five years and was shot a few days before American forces liberated Dachau concentration camp, a few weeks before the war ended. Elser is now regarded as a German resistance hero of the Second World War.
The film has been received generally positively by critics, holding a 60% approval rating on Rotten Tomatoes. The review in The Guardian newspaper noted the film as "...a heartfelt study of a man who tried to kill Hitler" The newspaper was also very complimentary about Christian Friedel's performance as Elser. However, the entertainment magazine Variety were less impressed, saying "... the absence of subtlety combined with predictable dollops of sentimentalism once again trivialize events in the name of making them understandable". In the Daily Telegraph review, the reviewer noted the film as having an "...overbearing sentimentalism and lacquered, Oscar-hungry sheen".