Bitter and hateful, the Grinch is irritated at the thought of a nearby village having a happy time celebrating Christmas. Disguised as Santa Claus, with his dog made to look like a reindeer, he decides to raid the village to steal all the Christmas things.
Inside a snowflake exists the magical land of Whoville. In Whoville, live the Whos, an almost mutated sort of Munchkin-like people. All the Whos love Christmas, yet just outside of their beloved Whoville lives the Grinch. The Grinch is a nasty creature that hates Christmas, and plots to steal it away from the Whos, whom he equally abhors. Yet a small child, Cindy Lou Who, decides to try befriending the Grinch.
Fueled by cheap whiskey, greed and hatred, Willie Soke teams up with his angry little sidekick, Marcus, to knock off a Chicago charity on Christmas Eve. Along for the ride is chubby and cheery Thurman Merman, a 250-pound ray of sunshine who brings out Willie's sliver of humanity. Issues arise when the pair are joined by Willie's horror story of a mother, who raises the bar for the gang's ambitions, while somehow lowering the standards of criminal behavior.
Each Christmas, Santa and his vast army of highly trained elves produce gifts and distribute them around the world in one night. However, when one of 600 million children to receive a gift from Santa on Christmas Eve is missed, it is deemed ‘acceptable’ to all but one – Arthur. Arthur Claus is Santa’s misfit son who executes an unauthorized rookie mission to get the last present half way around the globe before dawn on Christmas morning.
Scott Calvin is an ordinary man, who accidentally causes Santa Claus to fall from his roof on Christmas Eve and is knocked unconscious. When he and his young son finish Santa's trip and deliveries, they go to the North Pole, where Scott learns he must become the new Santa and convince those he loves that he is indeed, Father Christmas.
Two women, one from the United States and one from the United Kingdom, swap homes at Christmastime after bad breakups with their boyfriends. Each woman finds romance with a local man but realizes that the imminent return home may end the relationship.
Fred Claus and Santa Claus have been estranged brothers for many years. Now Fred must reconcile his differences with his brother whom he believes overshadows him. When an efficiency expert assesses the workings at the North Pole and threatens to shut Santa down, Fred must help his brother to save Christmas.
Kris Kringle, seemingly the embodiment of Santa Claus, is asked to portray the jolly old fellow at Macy's following his performance in the Thanksgiving Day parade. His portrayal is so complete that many begin to question if he truly is Santa Claus, while others question his sanity.