How far is a man willing to go to be with the woman he wants? Erika (Isabelle Huppert) is a veteran piano instructor at a famous music conservatory in Vienna. Erika is highly respected for her remarkable talent and strong discipline, but she's also known to be a harsh taskmistress and does not suffer fools gladly; among her students, Erika's class is considered a highly rewarding challenge, but difficult to weather. Erika seems to get her stern and unforgiving nature from her mother (Annie Girardot), with whom she still lives, and without a husband or a lover, Erika satisfies her strong but frequently perverse sexual appetites through extreme porn videos, voyeurism, and masturbatory practices that sometimes involve pain and self-mutilation. Erika discovers she has attracted the attentions of one of her students, Walter (Benoit Maginel), a gifted and good-looking young man who does not seem at all put off by her icy personality. She refuses to acknowledge Walter's romantic overtures, but when he rises to the