Following the events of Young Detective Dee: Rise of the Sea Dragon, Di Renjie was appointed to head the Department of Justice and conferred the prestigious "Dragon Taming Mace" by the Emperor Gaozong of Tang. Hence, he became the biggest obstacle to Wu Zetian's quest for ultimate authority. Empress Wu assigns Yuchi Zhenjin to lead a group of sorcery masters to take the Mace from Detective Dee. Unknown to all, using the Wu-Dee conflict as a cover, an ancient sorcerous sect has been in the background planning to exact revenge on the Tang Empire and destroy all those who come in their way.<ref name="July 27"/>