The ultimate power, the Triforce, comprised of power, wisdom, and courage. Around that power, the battle between good and evil wages over and over again, without end. Whenever the Triforce falls into the hands of someone evil, a hero in a green tunic always appears, to fight he demons and restore peace to Hyrule Kingdom. The hero who vanquished the last foe will break their spirit into four fragments and seal them away in different places, to keep it from happening again. Once this wicked soul is sealed away, a long time did pass. Until the day that a witch begins to change this.