In memory of their friend David, four women set out to walk the famous Overland Track in Tasmania's Central Highlands. It is the middle of winter and they are alone on the trail. Or are they? As they find themselves far from any help or chance of rescue, Jane records their growing fear that something is following them. Something they are terrified will catch up with them. As they race to get to the end of the track, they can't help asking: did they bring it with them?