Downstream is the story of a young man, Wes Keller, left to fend for himself as the world ended. Oil has run out. Crops have died. Groups of ruthless killers roam the land looking for anything, and anyone, who might be traded for what few goods remain. It is a grim picture painted of a potentially not-too-distant future. But there is hope. Rumors have spread of a city that exists, built before the world turned into a barren wasteland. Wes searches to find what may very well be the last chance for our survival.