As Hanna Casey drives her mobile library van between farms and villages she tries not to think of the sophisticated London lifestyle she abandoned after finding her barrister husband in bed with another woman. Or that she's living in the back bedroom of her mother's retirement bungalow in the small town she walked away from in her teens. Now with her daughter Jazz travelling the world, and her relationship with her mother growing increasingly fraught, Hanna is determined to reclaim her independence. But when the threatened closure of the library puts her plans in jeopardy, she finds herself leading a battle to restore the heart and soul of Finfarran's fragmented community.