 Tom Thumbleton, who lives with his parents on a sheep farm, finds some Aboriginal relics his great-great-grandfather left in the attic. Among them is a boomerang, and Tom finds that while it is in flight everything living stands still, and when he catches it again all goes back to normal. When Tom s cousin Harvey and an unscrupulous solicitor try to take over the Thumbleton homestead, Tom uses the magic boomerang to foil the attempt.