Alex O'Connell sets out to find the tomb of the evil Emperor Han. When he finds it Alex is tricked into awakening the ruler from eternal slumber, and the reckless young archaeologist must seek the help of the only people who know more than he does about taking down the undead: his parents. This time, the O'Connells must stop a mummy that has awoken from a 2,000-year-old curse who threatens to plunge the world into his merciless, unending service. As the monarch roars back to life, the O'Connell's find his quest for world domination has only intensified over the millennia.