The first timeline is set during the second world war. Operation Pied Piper has launched and all children living in London are to be sent to the countryside. As Hazel and her sister Flora board the train, they know their lives will change.
The second timeline is set in the 60's and for the last twenty years Hazel has though of her sister Flora every single day and what happened the day she lost her.
Got off to a good start but lost its way.