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?