内容简介：
This story is an adventure of four friends in a maze of tunnels built by gophers and other animals to remain hidden from people. Their adventure turns into a rescue when one of the friends is kidnapped by rats. Their rescue takes them to the tallest mountain in the world. Along the way they meet many animals from great white sharks and a frog that sails on the ocean. They also meet an animal so old that it has outlived even the legends and they now live in complete isolation.