Two brothers and their family growing up in Montana. Fly fishing and life lessons that come with becoming an adult....it is a very VERY good book and one of my very favorite movies. It hits close to home for me though as I grew up with two brothers in Montana. Such a special place....I only wish it was the same timeline as the movie. :) I actually had my groomsmen at my wedding dress in clothing like the movie and played the theme song as people were being seated.