Imagine a land where all the animals are free … To the creatures of the woodland, the land of Animalia sounds like a dream - a tropical island where all the animals live in harmony. They are over-shadowed by a much more evil community; the polluted Megatropolis, whose dirty skyscrapers block the horizon. And then one day, Wirral the Squirrel’s woodland is destroyed by developers and he is thrown into the nightmare world of Megatropolis. But Wirral believes in Animalia and he joins with Froggo, a world-class amphibian balloonist, and Wilhamina, a girl squirrel, to lead the enslaved animals of the city to a new life. So begins an exciting adventure through the mean streets of Megatropolis, over the sea and through the sky.