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.

The protagonist was sent to South America after the war. Now he is back home and wants to meet his old love. At the same time, he takes on the job of looking after his in-laws' children, two very bad boys, while their parents are on holiday abroad. What will become of it? Anyone who meets the "fantastic aunt" at the beginning of the film, as well as Huba and Csaba, will have an inkling.

In a castle, the General and Bálint gathered boys for a strange training. They want to select the most capable of them for the big operation. The choice falls on the Son, who must pass the final test before his mission. He will be beaten, but he cannot reveal the name of his handler. The Boy is not broken during the beating, but afterwards he falls into apathy, refusing to leave his room. Teresa talks to him emotionally, threateningly, logically - but to no avail. When she tells him that he will not get up, he gives her a cruel order...