Thomas isn't actually tall. He's called Tall Thomas because he likes to tell tall stories. It takes a neighbour with a magic spell to stop him. But it doesn't end there. If he wants the spell to stop working, he must start doing something he's never done in his life...Forelock Holmes and Doctor John Trotson are on the case of a mysterious threat to the princesses on the night of the Galloping Gala! Suspecting that he is out of his depth, Doctor Whooves and his companion Ditzy Do are called in to assist. What can be made of a villain whose cutie mark is a planet rent in twain, and of the amorous desire he shows toward Ditzy? Holmes' boundless confidence is unhindered, but how will he overcome this strange new opponent?