Erik and Hans are German boys. Ruby and Kate are English girls. They grow up in worlds that would never meet, until war tumbles their lives together. 

Then one September afternoon there are choices to be made.

How is courage lost, and found?
Who is really the enemy?
And what does friendship truly mean, in the middle of a war?
Meanwhile Rupert and Clarry work secretly for peace – and a brighter future for them all . .