An Australian family spends three months touring the continent in an old camper trailer.

Introduces Noni the pony, who is friendly and funny and lives at Waratah Bay, where her best friends are Dave Dog and Coco the cat.

After her pony Bella, trapped in quicksand, is rescued by a mysterious unseen person, ten-year-old Biddy follows the trail into the Australian bush and discovers the solution to a disappearance that happened years ago.