Schoolgirls Valda and Beth Johnston live in the 'hill country' where they ride for twenty miles to school and home each day. They love riding, and so do their horses. Their mother always has 'fresh tea and hot buttered scones' or something similar waiting for the girls on their return. Then the girls head out to check for stray sheep and cattle. One day, however, they spy a campfire that has been left burning and has ignited bushland up the side of the mountain. The girls assist heroically with the protection of their farm and stock and earn the title of 'the bush heroines'.