Sophie can’t walk or talk, but behind her disability hides a keen intelligence. Living on The Styx River cattle station with her father and a nanny, Sophie is acutely aware that she is a non-person. She feels as voiceless and isolated as the wallabies of The Wall, an eerie wilderness of basalt lava tubes forming a natural stone labyrinth that protects its remote lushness from anyone foolish enough to wander in. Sophie’s mother Rose, as The Wall’s indigenous custodian, taught Sophie its...