Josh has written his best track ever and decides he is going to sell CDs of it in school. But when he realises he has sampled a famous track without permission, he has to get all the CDs back before he is caught.

Dexter finds himself fronting Bell's new plan for Elmsbury - Project Zenith. But the plan has big, bad implications for the 4 O'Clock Club. Josh sets out to defeat the scheme, with a little help from his friends and family.