His friend (and his brother's ex-girlfriend) Iris offers to let him stay at her father's isolated island cabin, to restore his spirits.
Iris arrives at the cabin unexpectedly the next morning, and Jack suggests that he and Hannah shouldn't tell her they slept together.
Over the next day or so, the sisters gradually reconcile, with Iris offering to help Hannah to raise the child should she give birth.
Eventually, Jack returns to the cabin and requites Iris's love, also offering to help Hannah to take care of her possible baby.
The trio return to the city, and the final scene has Hannah taking a home pregnancy test with Iris and Jack joining her to see the result, which is not revealed.
The film was written and directed by Marion Vernoux and stars Virginie Efira, Grégoire Ludig [fr] and Géraldine Nakache as Marie, Pierrick and Tessa, the respective analogues of Iris, Jack and Hannah.