Molly is back in Ireland - or is she? Something strange has happened since she returned to Chicago. And it s not just going back a hundred years into the past. What is the secret of the boy she meets who appears to be a changeling? Will Molly solve the mystery that threatens to plunge her own family back into chaos? Will the dark secret endanger the fairy kingdom as well?

But first she has to figure out why Paddy Finegan, the leprechaun, has been acting so strangely since they raided that vending machine ...