Bobbie Moreton, daughter of 'Kangarooie' squatter Richard Moreton Snr, is a thorough sportswoman and her parents' pride and joy. Her brother on the other hand has been all but disowned due to his wild behaviour in the city and his refusal to take on the family's obligations. When Bobby asks him return home for her birthday he agrees, but does so in the company of Mrs Fane, a high society adventuress with a questionable past. Meanwhile, Dennis O'Hara, the Moretons' good-natured Irish neighbour, is in love with Bobbie, but clearly doesn't have a chance of winning her affection. Nevertheless, he gives her his horse, Alert, as a present. Bobbie enters it in a race but Mrs Fane, who has gambled on another horse, tries by various means to stop her winning. When a young and handsome distant relative of the Moretons arrives, there is an immediate attraction between him and Bobby. And despite all her machinations, Mrs Fane fails to stop Bobbie and she eventually rides Alert to victory.
