Detective Dee and the Mystery of the Phantom Flame

When the mysterious deaths of a series of loyal subjects threaten to delay the 690 A.D. inauguration of Empress Wu Zetian, she summons the former dissident/brilliant detective Dee (Andy Lau) back from an exile into which she cast him eight years earlier. However almost immediately, the investigation gets off to a rocky start with assassins lurking in the shadows, a detour into a mysterious underground market, and a sacred temple the Empress is determined to protect. Dee soon realizes that the strange deaths may end up threatening not just the empress' coronation, but the entire empire as well. (official distributor synopsis)