Dodo, the little orang-utan, lives in the depths of the green rainforest. He loves all the different sounds and noises and can imitate nearly every one of them: from splashing drops of water to chirping cicadas. One day, he finds a violin, a 'thingamabob', as Darwin the 'wise' old ape calls it. This thingamabob makes such a terrible noise that it even scares off the much-feared tiger. When the river dries out and the animals start to suffer under the great drought, Dodo discovers the greatest secret his music contains...