Ru-um and his younger brother Cali, on holiday in Northwest Scotland, go missing while on a walk to an ancient, ruined broch. Last seen with the mysterious girl, Amelia, they are eventually found several days later, unharmed, but with Cali now inexplicably older than Ru-um.
The story breathlessly follows the boys as Amelia takes them deep under the broch to the Flitspace - a gateway to another world identical to their own but completely uninhabited, except for the descendants of a small tribe who fled from Scotland one thousand years ago. However, Amelia hasn-t told them the whole truth of her world, or of the strange aging properties of the Flitspace. The boys quickly find themselves in conflict with Amelia-s powerful brother Mor-Ri and his enigmatic advisor known as Minister. With Amelia-s help, their own knowledge of the landscape, and the discovery of megafauna not seen in present day Scotland, the boys attempt to thwart Mor-Ri-s plans and escape back to
