The Millennium Sword Immortal returns from the fairy world and finds that the city has long been filled with evil spirit. The delivery boy turned out to be the incarnation of a fox demon, the company president was actually the reincarnation of a dragon, and even the convenience store downstairs was selling human blood drinks. He wanted to keep a low profile and live in seclusion, but he was forced to pick up the demon-slaying sword, but was told to abide by the "Modern Urban Demon Clan Public Security Management Regulations" - Do you have to report to the Demon Management Bureau first to fight?
