An invisible entity haunts a 19th century family, and family secrets soon begin to surface. Based on the true events of the only case in US History where a spirit caused the death of a man.

Four boyhood pals perform a heroic act and are changed by the powers they gain in return. Years later, on a hunting trip in the Maine woods, they're overtaken by a vicious blizzard that harbors an ominous presence. Challenged to stop an alien force, the friends must first prevent the slaughter of innocent civilians by a military vigilante ... and then overcome a threat to the bond that unites the four of them.