From the outside, respected behavioural biologist Claire is happily married, with a perfect son. But behind closed doors she yearns for more, throwing herself from one affair to another.
Young Julie is trying to piece her life together - unsure exactly she wants. She needs something to set her heart and mind on fire. She is also the new girlfriend of Claire's son, Nicolas, and through a chance encounter, becomes aware of Claire's double life.
With an extended family break on the French coast on the horizon, will this be the opportunity to let secrets lie? Or will one night in a Parisian hotel change these two womens' lives for all time?