***SPOILERS*** At first you think your watching the sequel of the movie "I walked with a Zombie" as the what looks like brain dead concert pianist Jan Volny, Francis Lederer, walking around the island of Guadalupe, with foghorns blowing in all directions, as if he was dropped off there from a UFO after being experimented on by the spacecrafts' alien crew members. Known by the people in town as "The Crazy One" Volny just sits in his shack endlessly playing on the piano Smetana's touching melody "Moldau" for endless hours at at time. Yes the guy is crazy but it was the music he played back home in Prague that got him to be that way.
It was in Nazi occupied Czechoslovakia that Volny makes the mistake in playing music forbidden by the Reich. That had him arrested and about to be interned in a mental institution to be deprogrammed by Nazi doctors and psychiatrists. On his way there Volny ended up killing the two SS men who ware taking him there thus making him a fugitive from the law, Nazi law, who was to be shot on sight for murder. With him now somehow getting to the island of Gaudalupe his troubles were far from over. It was his old lady Marya, Sigrid Gurie, who tracked him down there and is now herself suffering from double pneumonia because of the trip there that wrecked her health.
The film tries to show its audience that the Nazi's among other things didn't appreciate good music like hard rock rock & roll and country & western as well as the classics that Volny was so found off. It wouldn't have been a big deal for Volny to play the Nazie's music requests but his conscience wouldn't let him. He ended up playing himself into madness and obscurity that cost him not only his sanity but his both wife's, Marya, life as well as his own. And it wasn't the Nazis that did him in it was his fellow escapees from Nazi occupied Europe that did.