Wounded Civil War soldier John Dunbar tries to commit suicide—and becomes a hero instead. As a reward, he's assigned to his dream post, a remote junction on the Western frontier, and soon makes unlikely friends with the local Sioux tribe.
A briefcase with undisclosed contents – sought by Irish terrorists and the Russian mob – makes its way into criminals' hands. An Irish liaison assembles a squad of mercenaries, or 'ronin', and gives them the thorny task of recovering the case.
On Christmas Eve, divorced dad Scott Calvin and his son discover Santa Claus has fallen off their roof. When Scott takes the reins of the magical sleigh, he finds he is now the new Santa, and must convince a world of disbelievers, including himself.
