The Grinch (voice acted by Benedict Cumberbatch) is a green, grumpy creature who conspires, assisted by his trusted dog Max, to ruin the Christmas holidays of Whoville. The residents of this idyllic city have great plans for this year's festivities - they want to organize a holiday that is three times bigger than before. But, as it has happened during the last 53 years, Grinch feels miserable and is dedicated in spreading his misery. With the help of Max, who is always in good mood, Grinch is about to fulfill his wicked plans. At the same time, Cindy Lou Who wants to find Santa Claus and thank him for helping her widowed mother every Christmas. Being simple-hearted, Cindy has no clue that she is about to ruin Grinch's cover and save the holiday in Whoville.