After six months away from their failing scary school, Lizzie and Tyler Warren are shocked to find that 'every student is a star', due to the inspirational new headmaster. But how?

Lizzie is under the Headmaster's control, but Ethan Prendergast knows something is wrong and won't give up on her. They resist! Lizzie defies the Headmaster, but there is a cost.

Fearing the Headmaster plans to use the school science fair to hypnotise their families, Lizzie and Ethan hatch a plan to find out how the hypnotism works and stop him!

With the help of a surprising new recruit, Lizzie leads an espionage mission that unlocks the Headmaster's terrifying plan but also the painful truth about Ethan.

Lizzie is burdened by the secret of Ethan's past, but should she tell him? While Lizzie struggles with her moral dilemma, the rest of the gang get excited at a huge opportunity - the Headmaster is leaving the school premises to tour the schools he intends to hoodwink into joining the Hazelbrook Academy chain. With the Headmaster away, the gang will play - but how?

The gang decide to find out where the Headmaster came from and stumble on an intriguing clue that sends Lizzie, Ethan and Angelika on an exciting adventure. Following the clue leads them to an abandoned school, and they set off on a scary treasure trail around the building. Is whoever set this trying to help them, or is it a trap?

A mysterious new teacher fills in the missing pieces about the Headmaster and can help fight him - but can the gang trust her?

Blake takes drastic action against the Headmaster and the gang try and turn it to their advantage, but end up revealing painful secrets that could change everything.

In the final showdown with the Headmaster, how far will the gang go to save the world?