The Trollies arch enemy, Toady, sends Buck to Trollieland to spy and find out what the Trollies do for fun. Toady plans to steal the Trollies fun. Buck tunnels into the Trollies basement and joins in the fun the Trollies are having. The next day Buck returns to find the Trollies are giving him a surprise birthday party. The audio EPUB includes every word in the book and a musical background.