September, 1939. As the mass evacuation takes place across Britain, thousands of children leave London for the countryside, but when a little girl vanishes without trace, the reality of separation becomes more desperate and more deadly for those who love her. In the chaos and uncertainty of war, Josephine struggles with the prospect of change. As a cloud of suspicion falls across the small Suffolk village she has come to love, the conflict becomes personal, and events take a dark and sinister turn.