Small town girl Eszter adores her husband, Zoltán. He doesn't know Zoltán is having an affair with Alizka, until the woman moves in to their apartment.

Lt. Kojak arrives in Budapest as a guest speaker for the 'International Crime Writers Conference'. Soon after he starts enjoying the pleasures that the city has to offer, he assists his old friends at the police department with a case. The case involves solving the murder of a noted scientist, unaware that a Mafia hit man and his female companion are targeting him.

The movie version of Endre Fejes' short story is based on a case that happened in the early 1960s. A psychopathic working-class boy changes his identity for a few days on his hard-earned money. He pretends to be a Greek diplomat, pays for luxurious dinners, courts elegant women, and of course, always disappears before the engagement. But he falls in love with the beautiful Zsuzsa Christmas and can't leave her in time.