内容简介：
Matt is a lonely outdoorsman who begins his life anew in the wilderness after losing his wife, children, and farm in a flood years ago. One day Matt happens upon Sam, a photographer, and his dog, Moses. These city dwellers have traveled to Matt's neck of the woods to shoot pictures for "Our World" magazine. Matt saves Sam and Moses from a confrontation with a famished black bear and introduces them to his pet eagle, Quickshaw. Sam, Moses, Matt, and Quickshaw become great friends and share numerous adventures that lead to an exciting discovery-an underground water passage that connects to a hidden city. Its human inhabitants believe theirs is the only civilization in existence. Once word reaches the public about the secret city, fortune hunters want to find its location, believing it to be a source of great wealth. But the real treasure is the love these people have for each other and the peaceful harmony in which they live. The city holds an intriguing secret that renews Matt's interest in finding his family, presumed to be dead. Could they possibly be alive after all this time? Matt has some big decisions to make, and hopefully he can stand by them .