Leaving behind a madcap, fishing-obsessed family, Gus decides to strike out on his own, taking refuge in a secluded cabin on a remote riverbank to pursue his own fly-fishing passion with unrelenting zeal. But instead of finding fishing bliss, Gus becomes increasingly troubled by the degradation of the natural world around him and by the spiritual barrenness of his own life. His desolation drives him on a reluctant quest for self-discovery and meaning, ultimately fruitful beyond his wildest dreams.