Thowra helps Arrow escape from the Brolga after Arrow tries to get the fillies to join his herd. Thowra and Boon Boon find Yooralla, an orphaned brumby.

Thowra tries to help Boon Boon escape from her enclosure but they're only successful when Charlie opens the gate to set her free. Tired from the escape, Thowra and Boon Boon get stranded on an island when they attempt to cross a river to safety. The next morning, a reluctant Arrow is made to play the role of hero when he rescues them. The emus visit their relatives on the plains and decide it's a nice place to visit.

While Thowra is looking for a secret hiding place where they can all go in times of danger, Mrs Dingo loses Warri, one of her pups. When they find him, they discover a secret valley hidden in the mist. As Thowra is being chased by The Man, Mopoke advises him to disappear like a ghost, so he heads for the secret valley and leaps over the edge, disappearing into the mist. The Man is certain he has leapt to his death rather than be captured. Boon Boon returns to be with her family.

Charlie ventures into the high country on his own to visit his grandfather but gets lost and becomes stranded when his horse runs off. Benni, Thowra and the emus help rescue Charlie when he gets stranded on a ledge.

Charlie and his grandfather help free Yooralla when he becomes lost in a storm and gets trapped under a fallen tree. Thowra challenges the Brolga to keep him from adding Yooralla to his herd.

Arrow takes pride in being the first to announce the return of the trappers to the high country. Currawong and Mopoke get caught in one of the traps but Arrow can't free them and the Brolga refuses to help. They finally gain their freedom when the Man stops his chase of Arrow and Thowra to release them from their cage.

The creatures of the high country band together to drive out the trappers.

Baby Wombat is hit by the trappers' truck as they leave the high country. Yooralla helps Charlie take him to Charlie's grandfather where he can be looked after until he recovers from the accident. The trappers ute sinks when they stop to do some fishing.

After retrieving Baby Wombat from Charlie and his grandfather, Wombat decides to take his family on a trip to see their cousins up north. A lost fillie arrives in the high country in search of her long-lost brother. Wombat saves Thowra from the Brolga.

The Brolga chases Arrow away from his daughters again. Yooralla is reunited with his sister, Goonda. Yooralla is destined to lead his father's herd but will be allowed to stay in the high country for now. The Brolga gives chase to Yooralla and Goonda, who manage to escape when Arrow crashes into the Brolga. Goonda prepares to go back home and Arrow may be going with her.

Arrow seeks advice on whether to go south with Goonda. Goonda heads home after saying goodbye to Thowra and Boon Boon, and Arrow, who overslept, must chase after her to catch up. The Man follows Yooralla to Goonda and pursues them, nearly catching Arrow. Afterwards, Goonda invites Arrow to accompany her on her trip home.

The Man has brought Golden back up from the plains and after she hears about Thowra's supposed death, she escapes to go into the high country to look for him. The Trappers return, but this time the arrive in a hot air balloon. When the balloon crashes, Golden leads the Man to them to rescue them before she decides to leave the high country with the Man.