A number of passions have their “porn”- photos or films of epic adventures that most will never experience. For the next few weeks, Montanans will cast off their lined Carhartts and cabin fever and get a taste of summer while watching the 2016 Fly Fishing Film Festival with other angling fanatics.

But amid the documentaries showing men perfecting marlin fishing off the Virginia coast or howling over bass fishing in Guyana, one film steps back a little from the fish fetish to present a call to action.