Danny lives with his dad in an old gipsy caravan behind a filling-station. Danny's dad is the best - a wonderful mechanic, a brilliant storyteller and a genius at kites. But, as we all learn as we get older, grown-ups can be complicated creatures, and so it is that one day, when he is nine years old, Danny discovers that his dad has a deep, dark secret. It is a secret that is just about to lead them on a dangerous and thrilling adventure...