István, a király ("Stephen, the King") is a Hungarian rock opera written by Levente Szörényi (music) and János Bródy (lyrics), based on the life of Saint Stephen of Hungary. The storyline was based on the play Ezredforduló (Turn of the Millennium) by Miklós Boldizsár, who co-wrote the libretto. The opera was first staged in 1983 on an open-air stage in Budapest. This first performance was also made into a 1984 film, directed by Gábor Koltay, and its music released on an album. The musical became a smash hit and is still very popular in Hungary and among Hungarian minorities in neighboring countries.

A Hungarian band plays American rock & roll and blues hits with great enthusiasm and passion, but success seems to avoid them. TV and radio don't play their songs, sometimes even their crowd just sits and sips beer. Something must be done, and the band's leader (Lóránt Schuster) comes up with the big idea: write and play songs for the people about themselves and not about some exotic, but too distant people's life. "We move from Tobacco Road to Retek street." With the remains of the band and a second singer (Gyula Deák "Bill") they find what they failed to show people before. The rich new sound can finally translate the spirit of blues and rock much more than words from any dictionaries could, this is the Kőbánya blues.