When the magic powers of The Tablet of Ahkmenrah begin to die out, Larry Daley spans the globe, uniting favorite and new characters while embarking on an epic quest to save the magic before it is gone forever.
Hapless museum night watchman Larry Daley must help his living, breathing exhibit friends out of a pickle now that they've been transferred to the archives at the Smithsonian Institution. Larry's (mis)adventures this time include close encounters with Amelia Earhart, Abe Lincoln and Ivan the Terrible.
Archaeologist Rick O'Connell travels to China, pitting him against an emperor from the 2,000-year-old Han dynasty who's returned from the dead to pursue a quest for world domination. This time, O'Connell enlists the help of his wife and son to quash the so-called 'Dragon Emperor' and his abuse of supernatural power.
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.