Estelle leads a quarrelsome and boring life with her husband Simon, who doesn’t want her anymore, and their preadolescent daughter Lily, an aggressive girl with a bad temper. Not only does the 30-year-old woman see a promotion escape her, but she must now work under the orders of a careerist with a crushing tone, who looks down on her. Upon learning that her younger sister and her two best friends find her too wise and predictable, Estelle, stung, decides to prove them wrong. Unbeknownst to Simon, she challenges herself to participate in a threesome. Her search for partners of both sexes proves more difficult than expected. And when Simon accidentally finds out, she has no choice but to include him in her fantasy.