Vienna taxi driver Toni Sponer dreams of going to the US. One day, an American businessman is waiting for his cab, when jealous concert pianist Claude Manelli (Lederer) shoots him dead because he suspected him of having an affair with his American wife Karen (Camden). Toni grabs the dead man's papers and takes over his identity. Later he falls in love with Karen who initially thinks that Toni is the killer but he is able to convince her that he is innocent. Together they try to flee to America with Karen's husband in hot pursuit. Both men are finally captured by the police but Toni receives only a small sentence of a few months in prison. Karen decides to wait for him.