Counting rhinos, an airship with heat-seeking sensors and a mechanical arm . . . Tian and Lisa is in the Kruger park with granny Hester, collecting elephant dung with her zeppelin, the Arnosterfant. But who is Wang Mang? And why does he have flesh-eating fish in his helicopter? Will granny Hester be able to save Thembi and Joe and their tame rhino, Mafuta, from the evil poachers?