Zelda II: The Adventure of Link/Story
Shortly after the events of The Legend of Zelda, Link notices a strange mark on the back of his left hand, similar to that of the crest of Hyrule. He seeks out Impa, who responds by taking Link to a door in the North Castle; this door has not opened for generations. Impa places Link's left hand on the door, and it opens, revealing a sleeping maiden. Impa tells Link that the maiden is Zelda, the princess of Hyrule from long ago, and the origin of the "Legend of Zelda." Zelda's brother had tried to force her into telling their recently deceased father's secrets, where he had hidden the last of three sacred golden triangle treasures of his kingdom, known collectively as the Triforce. Princess Zelda refused to reveal its location; the prince's wizard friend, in anger, tried to strike her down with a spell. This resulted in a powerful sleeping spell, but also resulted in his own death. The prince, unable to reverse the spell, had his sister placed in the castle tower, in the hope that she would one day be awakened. He decreed that females born to the royal family from that point on would be named Zelda, in remembrance of this tragedy.
Impa says that the mark on Link's hand means that he is the chosen hero to awaken Zelda. She gives Link a chest containing six crystals and ancient writings indicating that each crystal needs to be placed in a different palace in Hyrule. This will open the way to the Great Palace, which contains the Triforce of Courage. This, combined with the other two parts, has the power to awaken the enchanted Zelda. Taking the crystals, Link sets out to restore them to their palaces. Meanwhile, the followers of Ganon are seeking to kill Link—sprinkling his blood on Ganon’s ashes would bring Ganon back to life.