Investigators Lu Lingfeng and Su Wuming return to Chang’an under the pretense of escorting a royal tribute, but soon find themselves entangled in a series of baffling crimes and political conspiracies. As they uncover hidden truths behind each case, their pursuit of justice draws them into a dangerous struggle that could decide the fate of the empire.

General Lu Lingfeng and Detective Su Wuming uncover supernatural mysteries and hidden conspiracies threatening the empire during Emperor Xuanzong’s reign.