"Dreamcatcher" tells the story of four young friends who perform a heroic act - and are changed forever by the uncanny powers they gain in return. Years later, on a hunting trip in the Maine woods, they are overtaken by a blizzard, a vicious storm in which something much more ominous moves. Challenged to stop an alien force, the friends must first prevent the slaughter of innocent civilians by a military vigilante, then overcome a threat to the bond between them. In the end, they confront an unparalleled horror, with the fate of the world in the balance.