Erika Kohut, 40ish, is a piano teacher at the Vienna Conservatory. She lives in close quarters with her mother, and to escape from the elder woman’s tyranny, she secretly hangs out at porn movie-houses and peep-shows. Her sex life consists of a morbid voyeurism and masochistic self-mutilation. Erika isn’t connected to life. Until the day that one of her students gets it into his head to seduce her…