They are the Tannenbaum Tailors: elves charged with maintaining Christmas trees in homes around the world. Without the Tailors' efforts, families might lose their Christmas spirit. And this year, one team of Tailors will be tested like never before.

With the North Pole itself under attack, newly promoted Captain Brendan is assigned a special mission: conceal the source of Santa's power within a Christmas tree in Chicago. On Christmas Eve, Santa will pick it up.

The job would be simple, but the Tailors find themselves facing a serious threat--the thieving Spiritless elves,...