Issie gets a new vision of Mystic running through the forest along an old railway track and wonders if this might be the clue that will lead her to Blaze's herd. After some encouragement, Issie decides to ride out on Blaze to find the tracks, and Caroline, Caleb, Dan and Natasha join her on the mission. As they journey deeper into the forest, past their favourite swimming hole, the kids make a series of bewildering discoveries and eventually realise they're completely and utterly lost. With one of the gang's future ambitions at stake, they face a race against time to ...