With the resurgence of spiritual energy in the world, ancient demons and monsters have resurfaced to wreak havoc upon the human realm. After the young Wei Yuan coincidentally obtains a tiger-engraved waist plaque dating back to the reign of Emperor Wu of the Han Dynasty, he becomes the last Chief of the Capital Police in our modern era. The "Folklore Museum" in the Jiangnan region, where he takes refuge, seals within its walls countless demons, ghosts, and monsters, with every artifact in its collection linked to a deeply buried historical secret. Wielding an eight-sided Han sword to strike down all manner of specters and evils, join the Chief of the Capital Police as he witnesses various strange and demonic events throughout the ages...