Three childhood friends, Tom, Jerry, and Dan, reunite in their hometown for the first time since high school when their fourth friend, Billy, passes away. While sifting through Billy's belongings, they discover a map that Billy believed led to the hidden treasure of infamous hijacker D.B. Cooper. Driven by nostalgia and the memory of their adventurous friend, they decide to honor Billy by embarking on a journey to find the treasure he was obsessed about.

Their quest leads them deep into the Oregon wilderness, where they navigate challenging river rapids, encounter a bear, and receive help from eccentric mountain men. As they venture further into the forest, the physical and emotional demands of the journey test their friendship and force them to confront their past and their present lives. Each step of their wild adventure brings new dangers and unexpected revelations, making the friends realize that the true treasure might not be what they set out to find.