Thowra saves a young foal from drowning and meets the Brolga's daughter Boon Boon. The Mountain Men capture two horses from Thowra's herd.

Thowra, not taking the threat from the man too seriously, initiates a chase with the Man through the High Country. Arrow attempts to rescue the two young horses caught by the man previously but only ends up getting himself and his brother Storm captured as well. Thowra convinces Wombat and his family help in their rescue.

Benni and Silky say goodbye to Thowra as they head north for the winter. Thowra and Boon Boon come to the rescue of two children lost in the High Country.

Spring returns to the High Country bringing with it men intent on capturing the brumbies. The Brolga's herd escapes capture thanks to Boon Boon, Thowra and his brothers, Arrow and Storm. Boon Boon seeks her father's blessing to leave the herd and venture out on her own.

Two trappers arrive in the High Country and Thowra learns that not all humans are dangerous when the old prospector saves Benni's daughter when she gets caught in one of their traps baby.