When we last saw Hamish X, he had been captured once more by the evil Grey Agents of the ODA (Orphan Disposal Agency), and the Wind City Orphanage had been destroyed. But with Mimis strength and Parveens ingenuity, Hamish X and all their Wind City friends are rescued. Now, new and surprising adventures are in store for everyone, when they make their escape to… Switzerland! Deep within the Alps, the worlds lost children have found safe haven in a hidden world. It is here, in the Hollow Mountain, where the mysteries of Hamish X, his boots, and his past will begin to unfoldif the Grey Agents dont get to him first!