In the Far East, Alex O'Connell, the son of famed mummy fighters Rick and Evy O'Connell, unearths the mummy of the first Emperor of Qin -- a shape-shifting entity cursed by a witch centuries ago.

Identical twins are separated at birth, one becoming a streetwise mechanic, and the other an acclaimed classical concert conductor. Finally meeting in adulthood, they each become mistaken for the other and entangled in each other'...