While an out of control wildfire devours the high country plains of Victoria, recently orphaned Clarrise and Chris Darcy flee with their horses down a steep and rugged gully called The Overflow. Rescuing a herd of wild horses and their Nanna's Hereford cattle along the way, they battle the ravages of the fire and sharp shooters who try to eradicate their Nanna's prized bull, Bawldy. The future of their farm and family hinges on saving the horses and the Herefords but first they must survive the all-consuming, unstoppable flames?