Gahi, the daughter of the Jade Emperor, is banished to the human world for breaking heavenly laws and is ordered to become a magical police officer and serve in the human world. In the magical police unit, she meets Galgal and Okdongja, and receives the best treatment from them. The magical police unit engages in a fierce battle with samurai villains who have turned into ghosts and defeats them. Ji-oh's group, on a quest for the necklace of darkness, finds these necklaces one by one. When three necklaces of darkness are gathered, they form the shield of darkness, and whoever possesses this shield will gain immense evil power. Ji-oh obtains the shield of darkness with the three necklaces and acquires colossal evil power, and the magical police unit begins a fierce battle against him. How long did this long battle last? Finally, Ji-oh is destroyed and killed by the magical police unit. As all events conclude in jubilation, the Great Celestial General attempts to take the fairy Gahi back to heaven, but Gahi refuses to leave the magical police unit she has grown accustomed to...