The first part of the book tells about the club for crossing dogs and several of them tell stories after their lives about their lives. Then, leaving the dogs behind, Dr. Dolittle becomes obsessed with learning the language of insects, so he invents a machine for this and, eventually, manages to learn several stories about insects. Dr. Doolittle hears rumors of giant moths, so he asks his animal friends and insects to learn more about them. Then, quite unexpectedly, a giant moth appears in his garden and he learn to communicate with them.