Historical fact blends with high-flying fiction as Jackie Chan steps into dual roles as a determined archeologist and a loyal general of China's first emperor in director Stanley Tong's lavish historical action film. Jack (Chan) is an intrepid archeologist in search of a mythical gemstone that is said to have the power to defy gravity. Though Jack's days are spent traversing the globe with scientist sidekick William (Tony Leung Ka-fai) in hopes of finding the elusive gem, at night in his dreams he assumes the role of General Meng-yi, devoted servant of Emperor Qin Shi-huang. As Jack and William venture to the mystical Heavenly Palace -- a wondrous fortress rumored to have been built by Qin Shi-huang himself -- Jack's vivid nocturnal journeys find him falling head-over-heels for the emperor's comely Korean consort Ok-soo (Kim Hee-seon).
by Jason Buchanan synopsis