In the green, cheerful courtyard lived the rooster Mr. Casper. Every morning he put on his funny yellow hat and crowed loudly, waking up all the animals. One day, as Mr. Casper performed his morning dance, the hat suddenly .... disappeared! The startled rooster looked around. Next to him stood Ola the hen, laughing and saying: "Maybe the hat flew in a balloon to the sky?". Behind them came the jolly piglet Franek and suggested: "Or maybe the hat was hidden by Susie the goose? She likes mischief!" Everyone started looking. They found only a rubber duck under the bucket, cucumbers in the barrel, but the hat was nowhere to be found! Suddenly, a quiet sound came from the old barn: "Chrum-chrum..." and a mysterious clatter. The animals looked at each other with big eyes and slowly moved towards the barn. What would they find there...?