Jimmy the duckling, along with his friends Jonny and Jeffrey, loves to play and have adventures.Along with many of the other animals around, they often work together to solve problems.When Jimmy's sister Hetty tells him he has lost his sense of humour, the three friends set off to find it again. It quickly becomes clear that they need help from the wisest animal around: Tudor the Shire horse. He will know exactly what to do.But who will help the lambs...