Max wants to be just like his dad - fun, loud and strong. He loves their trips to the fair and Dad's no-nonsense attitude when Max gets in trouble at school. But everything changes when mysterious boxes and even more mysterious wads of cash start turning up at their house, and when Dad disappears it's up to Max to look after his three sisters until Dad comes home.
Determined to keep the family together, Max takes his sisters to a remote village in Wales, where he's convinced that no one will find them. What Max doesn't expect to find is new friends, new questions, and a very old legend. Just how easy is it to look after three kids with no grown ups around? Where did Dad go, really? And what are the whispers Max keeps hearing, of a golden dragon, asleep under the mountain...?