Sibyl (Virginie Efira) is a psychoanalyst who decides to drop most of her patients when she is overwhelmed by the desire to write, seeking inspiration from Margot (Adèle Exarchopoulos), a young actress who begs her to receive her. Whilst shooting, Margot becomes pregnant with the lead actor’s child... who maintains a relationship with the film's director. As Margot tells her of her passionate dilemma, fascinated Sibyl secretly records the sessions. The patient's narrative feeds her the idea for the book while plunging her into the whirlwind of her past. When Margot begs him to go with her to Stromboli to watch the end of the shoot, everything speeds up at breakneck speed.