"The Grinch" is a fictional character created by Dr. Seuss in the book titled "How the Grinch Stole Christmas!" The story is set in the fictional town of Whoville, where the Grinch, a green, furry creature, despises the festive spirit of Christmas. He devises a plan to steal the holiday from the joyful Whos by taking their decorations, presents, and food. As the Grinch carries out his scheme, he discovers the true meaning of Christmas when he hears the Whos singing despite their losses. This revelation leads to a change of heart, and he returns everything he stole, embracing the spirit of generosity and community.