Marie leaves her family and moves to Lyons to study piano at the conservatory there. For economic reasons, she shares an apartment with Emma, a childhood friend, who has lived alone since her father’s death and her mother abandoned her. Marie submits to the rules and regulations imposed by her roommate, which become increasingly oppressive as time goes by. Emma fascinates, dominates, and undermines Marie as she struggles between her desire for Emma and the urge to escape. Her obsession drains her energy, and she loses her focus for music…