Original: To save Hyrule , Link is required to rescue the seven descendants of the Seven Sages from dungeons scattered across the Dark World . Once the seven maidens are freed , they use their power to break the barrier around Ganon 's Tower , where Link faces Agahnim again .
Simplified: He has to find the seven crystals that have seven maidens in them , including Zelda , so he can get to Ganon 's Tower .