It's the build-up to Bonfire Night, and a new face has arrived in Scatterbrook. Worzel's cousin, Guy Forks, has taken his rightful place at the top of the bonfire, but an argument between the old friends leads to a competition to prove who can do the other's job better. With the Bonfire Night Committee distracted, Guy convinces Worzel to swap places, but it soon becomes clear that Worzel has bitten off more than he can chew. With Worzel stuck on top of the bonfire, John and Susan turn to Aunt Sally for help, but can they find a way to rescue Worzel before time runs out?

FR Peregrine's travelling fair arrive in Scatterbrook, which Worzel desperately wants to attend but can't risk being seen by the humans of the village. So, he seeks out a magical organ which legend says has the power to send humans to sleep, allowing scarecrows to enjoy everything the funfair has to offer. At the museum, Aunt Sally finds herself agreeing to go on an adventure with another ex-fairground attraction, Calliope Jane, and it turns out Worzel isn't the only scarecrow who wants to attend the fair. As the scarecrows descend, the risk of being seen intensifies, but will the legend of the enchanted organ turn out to be true?