It's summer in Finfarran on the west coast of Ireland. Librarian Hanna Casey is looking forward to al fresco lunches with friends, and balmy evenings with her boyfriend Brian in their stunning new home in the beautiful Hag's Glen. With family drama and a painful divorce behind her, Hanna is browsing romantic holiday brochures and making plans with Brian for the future.

Then, unexpectedly, Brian's adult son moves in with them, and Hanna re-encounters Amy, one of three girls with whom she shared a London flat in her twenties. And all of a sudden, Hanna begins to question her apparently perfect life. When Amy suggests a visit to London's bright lights and a flatmates' reunion, Hanna accepts.

But, while it might be a short hop to England, somehow she feels like she's leaving Brian too far behind. And when Hanna is given a new opportunity, the chance to be more than a local librarian who's settled back into the little rural community where she grew up, she realises she has tough choices to face...