Chaos reigns at the natural history museum when night watchman Larry Daley accidentally stirs up an ancient curse, awakening Attila the Hun, an army of gladiators, a Tyrannosaurus rex and other exhibits. Larry tries desperately to keep the museum under control, but he's fighting a losing battle until President Teddy Roosevelt comes to the rescue.
A postman, S.D. Kluger, decides to answer some of the most common questions about Santa Claus, and tells us about a small baby named Kris who is raised by a family of elf toymakers named Kringle. When Kris grew up, he wanted to deliver toys to the children of Sombertown. But its Mayor is too mean to let that happen. And to make things worse, the Winter Warlock who lives between the Kringles and Sombertown, but Kris manages to melt the Warlock's heart and deliver his toys.
Fortune hunter Holly Golightly finds herself captivated by aspiring writer Paul Varjak, who's moved into her building on a wealthy woman's dime. As romance blooms between Paul and Holly, Doc Golightly shows up on the scene, revealing Holly's past.