Biggles learns the law of the jungle. It is the late 1930s. With the after-images of the Roaring Twenties fading and the world heading once more towards conflict, Biggles, Algy and Ginger head for tropical climes, and the trio layover in Belize. While there, Biggles looks up his old pal Carruthers, Acting Governor of the territory, who is having problems. Someone – rumours abound about a self-styled 'King of the Forest' – is interrupting the flow of the nation's chief export, chicle, which is used to make chewing gum. In addition, three Americans have gone missing in the jungle, reportedly looking for treasure. Belize has no air force, and so Biggles volunteers to take his amphibious aircraft, Wanderer, upriver to investigate… Biggles flies again on another international adventure, perfect for fans of Derek Robinson and Max Hennessy.