Shi Heifu, a top-level commander of the Qin Dynasty, was transferred to the Secret Service Department that specializes in handling "unusual cases" because he dug up a mysterious lacquer box while investigating a "haunted" incident. He solved the case along the way, but found that with every case he investigated, he was clearing obstacles for Qin Shihuang's "Imperial Mausoleum Plan". When he finally walked into the Lishan Underground Palace, he could only choose the same rule of Qin he believed in and the human life he wanted to protect.
