The 2003 film stars Will Ferrell as Buddy, an adult who grew up in the North Pole among Santa and elves. Buddy thinks he's an elf too until he leaves the North Pole to find his human father, Walter Hobbs, played by James Caan.
Buddy finds his father, who is initially reluctant to care for him, in New York City. While Buddy explores the city, gets to know his family, and falls in love with a lady, Santa struggles to prepare for Christmas Eve. His sleigh runs primarily on Christmas spirit, a source of fuel that the world is running low on.
Santa ends up crashing in Central Park while trying to deliver gifts, and Buddy gets the chance to act as his elf by helping him with the sleigh. Meanwhile, Buddy's new loved ones help Santa by bringing the Christmas spirit to Central Park through song. And together, they all save Christmas.