An aggressive National Parks & Wildlife Service inspector arrives at the Waratah National Park determined to instill fear into everyone at Ranger Headquarters.
Sonny's been reading a lurid novel about blackmailers and he spots Clancy crying after reading a letter, he becomes convinced that his young friend has received a note from someone demanding money.
Sonny is trying to study for school exam when Skippy takes him to a baby wombat whose mother has disappeared. He takes it back to ranger headquarters where chaos ensues when Mark tries to take him to quarantine.
When Sonny and Skippy discover a herd of wild horses damaging vegetation in the Waratah National Park, Matt enlists the aid of two champion rodeo riding brothers to capture them.
An elderly ornithologist is determined to prevent a group of young water skiers from using the river and scaring off the birds he is recording the sounds of.
There has been a bank robbery and the two robbers have hidden the money in a treasure chest in Matt's car. The chest should contain the prize for a treasure hunt being organised for children in Waratah National Park by the rangers.
Sir Adrian Gillespie enters a horse in the Corinthian Handicap, a race for male amateur jockeys, at Royal Randwick. Skippy places a $1 bet on a horse with odds of 33:1.
Sonny gets a job with a local gardener so he can earn some pocket money to donate to charity. Skippy asks his bush friends to help search for a lost cat.
Sonny is not feeling well and Matt asks a friend to pick up some medicine in town. However, he gives Sonny some horse medicine instead. At the same time, Sonny fills the ranger station with animals causing chaos.