Frau Kellner takes her teenage daughter Inge to the sauna. Although it's the ladies' day, a man insists on entering. After he is given credit by a client (Christine Szenetra), Frau Kellner goes to the owner Brandauer to complain but he acts indifferently. When she returns, she finds out that her daughter had been engaged in the events as well. Things get nastier after it is revealed that the man was installed by Brandauer and an orgy where Inge is anally deflowered by him ensues.