In the summer before their final year at Trinity College, Frances and her best friend Bobbi meet an impressive local writer, Melissa. Bobbi quickly develops a crush on Melissa but Frances is unexpectedly drawn to Melissa’s husband, Nick.

At Melissa’s birthday party, Frances finds herself alone with Nick. They can’t resist the attraction between them and kiss. The next day Frances visits her parents in the country and agonises over what this turn of events might mean.

Back in Dublin, Frances and Nick meet to discuss the kiss. Their attraction deepens and they begin an affair. Things become complicated when Nick travels to Scotland for work. Frances is unable to confide in Bobbi and their relationship also suffers.

As final year at Trinity begins, Bobbi reveals she is looking for a room to rent and Frances asks her to move in. Nick returns from Croatia. He and Frances contemplate being more open about their relationship – which excites and frightens her.

At Melissa’s book launch Frances struggles with her growing feelings for Nick. Her jealousy frustrates Bobbi. Feeling alone, Frances seeks intimacy elsewhere but the reality of her feelings for Nick cause her to behave in a destructive way.

Frances receives a surprise email from Melissa and the groups’ dynamics are tested in unsuspected ways. Frances’ dad leaves a concerning voicemail and Bobbi also has problems with her family; she and Frances experience a shift in their friendship.

Frances faces up to the consequences of her actions and attempts to repair her relationship with Bobbi. She also finds a fragile understanding with her parents. But as she strives to take control of her life, the question of her and Nick remains.