Erika, who is in her forties, is a stern La pianist who teaches piano at the Vienna Conservatory, and is known for being strict with her students. She lives with her elderly but controlling mother and is extremely disciplined by her mother. Growing up underneath, it led to the repression of contradictory desires and dissatisfaction in the future, trapped in this relationship, the two women tortured each other and quarreled day after day. The only way for the virtuous-looking Erica to vent is to go to the video store to watch pornographic videos and to the outdoor cinema to watch lovers have sex to vent their lust, and even go to the toilet to use razor to get pleasure from herself. Express the anger and dissatisfaction in the heart through pathological desire for voyeurism and self-destructive masochism.
Until one day, a blond and energetic male student eagerly entered her life as a teacher, attracted by her peculiar and quiet appearance, coupled with his own peculiar personality, began to engage in a series of sexual temptations to the teacher. To abuse each other mentally and physically
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