One day Amy and her family moved a long, long way away to the other side of the world.

Louis stopped building towers, digging holes and staring at clouds. He no longer called to anyone across the yard, the room or the fence. Amy and Louis live next door to each other, and their lives are closely intertwined. Theirs is a life rich in imagination - they see dragons in the clouds and make castles out of cardboard.

But when Amy’s family moves to another country, the children are separated and the colour drains out of their lives. Until Louis discovers how to rebuild their special bond.