Detective Dee: The Mystery of the Phantom Flame

Di renjie: Tong tian di guo is a movie starring Tony Ka Fai Leung, Chao Deng, and Carina Lau. An exiled detective is recruited to solve a series of mysterious deaths that threaten to delay the inauguration of Empress Wu.
When the future empress Wu Zetian's two courtiers die in a mysterious fire, she gets Di Renjie, a former detective and rebel, released from prison to solve the mystery of the fire.