In the deep jungles of Darkest Peru, British geographer Montgomery Clyde happens upon a previously unknown species of bear. He is about to shoot it to take back a specimen to the United Kingdom when a second bear playfully takes his gun away. He learns that this family of bears is intelligent and can learn English, and that they have a deep appetite for marmalade. He names them Lucy and Pastuzo. As he departs, he throws his hat to Pastuzo and tells the bears that they are always welcome should they wish to go to London.