Hairy Maclary causes trouble again when he is simply not in the mood for the Kennel Club's Obedience Class. He feels mischievous and mad and not only does he scamper away but all his friends - Bottomley Potts, Muffin McLay, Hercules Morse, Schnitzel von Krumm and the rest follow "Galloping here, galloping there, rollicking, frolicking everywhere".