Ripped away from her home and friends, Cat Parkes Perez struggles to adapt to life after her mother, Isabel, unexpectedly becomes Australia's newest Prime Minister.

Cat works with her new friends to unmask the troublemaking Agitators and, when special visitors come to school, Cat wants to make her voice heard.

Cat competes in a mock parliament with crucial evidence against the Agitators on the line. Meanwhile, excitement bubbles around the arrival of a global superstar.

When Isabel and Cat host an impromptu 'ball' at the Lodge, Cat smells a rat - one that could take down the Prime Minister.

The Agitators target Cat, Sadie and Ollie amid Sadie's Year Leader nomination. Meanwhile, Isabel disappoints Cat during a special day on the Spanish calendar.

The Prime Minister and her family are being interviewed on live TV, while Cat wrestles with a dilemma presented by foe-turned-friend Miro.

When Cat is lumped with a suffocating security detail, Ollie and Miro must put their differences aside to take the lead on the Agitator hunt.

After a shocking discovery about the mysterious insider, Cat and the gang close in on their target. Meanwhile, Isabel makes a discovery of her own.

Cat must unite opposing forces to bring down the insider and save Isabel's career, while her relationships with Isabel and Ollie hang in the balance.