German cabaret star Lili Marleen inspired a song that was extremely popular with the German soldiers during WW II. This war drama offers a fictionalized account of her story that begins in 1938 while she performs in a Zurich cabaret. It is her boyfriend, a Swiss Jew who also turns out to be a resistance fighter who pens her famous song.
She sings it in Germany and it becomes a hit with the German troops. As a result, Hitler himself invites her to perform for him. This does not set well with the songwriter's powerful who, upon learning that Marleen has become a famed singer in Germany, seek to have her barred from Switzerland.
This does not stop the songwriter from loving her though and desperate to see her one last time, he sneaks into Berlin for a tryst. Unfortuantely he is arrested and she gets blacklisted. They do not see each other again until after the war. By this time, their lives have changed considerably. This is not considered among the best of Fassbinder's best films.