Shendu and the Dark Hand find a clue to the first gate that will enable him to release his sister, the Mountain Demon. Jackie goes to Japan to stop them, while Uncle begins to train his new apprentice, Tohru. Meanwhile Jade causes havoc with a duplication spell.

Jackie, Uncle, Tohru, and Jade discover that they have overlook something in the ancient writings by making the horrible mistake of placing the final oni mask along side the other eight in Section 13. By doing this, they have released Tarakudo and his generals from the masks that bind them. The entire world begins to be engulfed in total darkness as the shadokahn are now free to walk the earth.