Aisha is a thirteen-year-old refugee living in London. Happy for the first time since leaving her war-torn home, she is devastated when her foster mother announces that a new family has been found for her and she will be moving on. Feeling rejected and abandoned, Aisha packs her bags and runs away, seeking shelter in the nearby woods.Meanwhile, a few doors down, twelve-year-old Zak is trying to cope with his parents' divorce. Living in a near-building site while the new house is being refurbished, he feels unsettled and alone. Discovering a piece of rubble with the original builder's signature set into it, he starts researching the history behind his home - and in doing so finds a connection with a young soldier from the past, which leads him to an old air-raid shelter in the same woods.Both children, previously unknown to each other, meet in the heart of the ancient city woodland as they come into the orbit of Elder, a strange homeless woman who lives amongst the trees - and, as helicopters hover overhead and newspapers fill with pictures of the two lost children, unexpected bonds are formed and lives changed forever . . .