Four young grade-school girls witness the murder of one of their classmates during what they thought was just an innocent game. The killer is a strange young boy named Milo Jeeder. Sixteen years later, the four survivors of the event re-unite under happier circumstances in the same town where it happened. They believe that Milo drowned in a river shortly after the murder, but soon learn that the demonic killer Milo has also returned, still a young boy, unchanged even after almost two decades.
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.
