Deep in the remote heart of the jungles of Mendip, Sebastian, Max and Cornelius are in search of a legendary lost city. On route, they encounter the Jilith, a race of warriors locked in a deadly struggle with their mortal enemies, the fierce and brutal Gograth. Can Cornelius train the Jilith to defeat their enemies? Why does jungle girl, Keera think she knows Sebastian? Can Max avoid being turned into spare ribs? And, if they ever find the Lost City, can the three friends survive the ravages of the Night Runners - terrifying creatures that are already dead . . . ?