Solving mysteries is a risky business. But no mystery is too big for Holly, Miranda and Peter . . .
The Mystery Kids are in Cornwall - the home of smugglers! They're staying at Greystones, the imposing old house of Mr Allenbury - and Miranda is convinced that he is a smuggler!
But then his young daughter, Lucy, disappears . . . Has she really gone to stay with her aunt- or has something more suspicious happened to her . . .?
