When brother and sister Drew, 11, and Sammy, 5, are orphaned they fear that they will be separated when they are sent to an orphanage.  The children set out for Perth from the small country town of Wyanilling, blithely believing they will find a ship sailing to England and their grandparents. It is desperate trek through the Australian bush. The police are out in force, searching for them with trackers, rewards are offered and the story builds until politicians become involved in the plight of two small children, wandering the vastness of the Australian bush alone.