Nathalie teaches philosophy at a high school in Paris. She is passionate about her job and particularly enjoys passing on the pleasure of thinking. Married with two children, she divides her time between her family, former students and her very possessive mother. One day, Nathalie’s husband announces he is leaving her for another woman. With freedom thrust upon her, Nathalie must reinvent her life.

When Michèle, the CEO of a gaming software company, is attacked in her home by an unknown assailant, she refuses to let it alter her precisely ordered life. She manages crises involving family, all the while becoming engaged in a game of cat and mouse with her stalker.