It is the last day of the summer holiday before school starts again and the self-named Great Kieranski is determined to have an adventure even if he has to invent one! Joined by his crew of best mates they use recent events as a reason to save their town from aliens, bullies and the evil Bardbuy.
The Great Kieranski and the Crew are at it again! Kieranski discovers that there might be dangerous aliens called Baldy Grammars selling tainted cakes in their town. With his best friend Jonno, next best friends Matty and Benji they investigate how to save the town from terrible creatures that could be real if anyone had ever seen them.