Budapest in the thirties. The restaurant owner Laszlo hires the pianist
Andreas to play in his restaurant. Both men fall in love with the beautiful
waitress Ilona who inspires András to his only composition. His song
of Gloomy Sunday is, at first, loved and then feared, for its melancholic
melody triggers off a chain of suicides. The fragile balance of the erotic
menage a trois is sent off kilter when the German Hans goes and falls in
love with Ilona as well.