Pipì Pupù & Rosmary decide to have a picnic, but while they are eating, a strange rain floods the place where they are sitting. In fact the wetness isn’t rain, but the tears of the weeping willows in whose shade they are sitting. The Great Willow tells them that his weeping is a sign of great joy… At that very moment a strange animal arrives, splitting its sides with laughter. It’s a hyena and she’s called Camilla, a little hyena who has lost her way and in fact isn’t laughing but crying. Thus the three friends learn that weeping doesn’t always mean sadness and laughter isn’t always a sign of happiness. What a strange world this is!