London, 1915: Tarot reader Katerina is trying to hold her life together amid the wartime chaos. When she opens a bakery that offers divination alongside sweet treats, she is hailed as a beacon of hope. But Katerina is hiding a dark truth that could cost her everything. Germany, 1918: A mute British soldier is taken to a prisoner of war camp where he meets Miriam, a researcher. She is drawn to his gentle manner and secretly vows to help him. But soon she will have to make an impossible choice: will she save the one she loves, or herself? Cornwall, Present Day: Recently widowed Edie is astonished to discover a mysterious box hidden in the wall of her newly renovated cottage. As Edie starts to investigate, she uncovers a secret that has lain hidden for over a century...