Notes

"Twelve-year-old Toby and his sister Millie, fourteen, are tramping the Heaphy Track with their mother when they go off-track to find an old surveyor's hut their grandfather used. When their mother breaks her leg in a hidden hole the kids must head back to fetch help. They spend some nights alone, hungry and lost. So far, so ordinary, but there is something strange about the cave they've sort shelter in. When a strange little woman emerges with the promise of food and shelter they reluctantly follow her into an underground cavern that is deeper than they first thought and a whole lot more dangerous