
Museum guard-turned-entrepreneur Larry Daley knows a little something about what goes on at a museum after dark. After some of his favorite exhibits from New York's Natural History Museum are shipped to the Smithsonian, Larry receives a distress call from miniature cowboy Jedediah. It seems the Egyptian ruler Kahmunrah and a trio of historical baddies, including Ivan the Terrible, Napoleon and Al Capone, have hatched a plot to take over the museum, and then the world. Now Larry must hightail it to Washington, D.C., to thwart their dastardly plan — but he won't be able to do it alone.