2019 Dublin. When Jessie Daly loses her job, her flat and her relationship, she travels home to Ireland's west coast and helps an old friend researching what happened in the area during the 1840s Famine. They are drawn into the remarkable story of a brave young mother called Bridget Moloney, and Jessie becomes determined to find out what happened to Bridget and her daughter, Norah.

On the other side of the Atlantic, Kaitlin Wilson is researching her family tree. She knows her ancestors left Ireland for Boston in the 19th century. Everything else is a mystery. Kaitlin unearths a fascinating story, but her research forces her to confront uncomfortable truths about herself and her family and also uncover a heartbreaking connection to a young woman in the west of Ireland...