Jelly (who is wobbly only when she runs and when Roger Lovely is in the vicinity) and her geeky best friends Ruby and Myf are going to secondary school. They know it's time to be cool and stop playing with dolls in their secret club - the trouble is, none of them is cool at all.
Jelly's mum and stepdad are like chalk (a bit screechy) and cheese (a bit smelly) and her brother accuses her of showing off even when she's not doing anything at all. They're not helping the cool situation either, until Jelly's mum suggests a birthday party . . .