After the death of her parents, Mary Jones discovers a secret in the pages of her father's diaries. Her search for the truth brings her to Cliffehaven. Here, she finds work at the Kodak factory, shifting through the Airgraphs which are being sent from all over the world by people in the armed forces. With the help of Peggy Reilly, Mary starts to build a new life for herself. But events that happened eighteen years before still echo, and should a promise Peggy made then be broken, it will have a devastating effect not only on Mary, but them all.