Follows the adventures of Lomax, a good-natured, melody-obsessed puppet pooch, his feline sidekick Delta, and their human companion, Amy, on a tune-filled train ride crisscrossing the musical landscape of America. With the help - and full participation - of real kids on the train, on location, and the viewers at home, Lomax and his friends track down the wonderful songs that form the heart of our nation's diverse musical heritage.