After a thunderstorm, a flock of rare choughs turns up at Scatterbrook Farm. Keen to seize the opportunity to scare such a rarely sighted bird, Worzel enlists the help of Susan and John. But their plans are soon scuppered as word of the choughs gets around and a group of avid birdwatchers moves in. With the twitchers refusing to leave, can the children come up with a plan to help scare the choughs and save Worzel from embarrassment?

Susan and John are excited when they learn that FR Peregrine’s Travelling Fair is coming to Scatterbrook for one night only. But as much as he’d love to join his friends, Worzel can’t be seen wandering around by humans. He recalls the legend of a fairground with an enchanted organ. It is believed that, with the right music, the organ has the power to send humans to sleep so that scarecrows can enjoy the rides without the fear of being seen.