London, 1941. The war has robbed eight-year-old orphan Elsie of everything except her older brother Jack. Evacuated together, they escaped a cruel farming family only to find their home destroyed, their mother gone. Elsie hasn't spoken since. Wandering under the falling ash, their stomachs twist with hunger and Jack knows he cannot protect Elsie alone. But everything changes when they join a rag-tag band of orphans, runaway evacuees who've returned to the city just like them. With nothing left to lose, the children stay above ground as Nazi planes fly overhead, determined to help others. But who will protect them? Then during a night of terrible bombing, Elsie disappears. Jack and his friends search through the flames and smoke, knowing she has no voice to respond to their cries. Will anyone find her before it's too late? And will the lost orphans ever find a safe home?