You’ve read the title correctly, the entire Skyward Sword plot has been leaked out. Basically this would be the mother of all Skyward Sword spoilers, am talking new enemies, bosses, hints on where to go throughout the game and much more so if you’re one of those who like to play the game and still figure out its puzzle then I advise that you continue your stay on the site and skip this post but if you do take the jump beware of this massive spoiler.

• Go meet Zelda, who is waiting by the Statue of the Goddess.
• Search for your missing Loftwing.
• Use the map to search near the waterfall for your bird.
• Triumph in the Wing Ceremony race.
• Follow the mysterious girl who appeared in your dream.
• Fly to the column of light and descend through the clouds to the land below.
• Search for Zelda, who seems to have landed safely.
• Go to Faron Woods and search for Zelda.
• Gather information on Zelda from the Kikwis.
• Use the Slingshot to reach the temple where Zelda is.
• Search for Zelda, who is somewhere in Skyview Temple.
• Return the tablet to the Statue of the Goddess in Skyloft.
• Travel to Eldin Province using the new column of light.
• Search for Zelda in Eldin Province.
• Search for the key to the temple at Eldin Volcano.
• Use the completed key to open the door to the temple at Eldin Volcano.
• Search for Zelda in the Earth Temple.
• Return the third tablet to the Statue of the Goddess in Skyloft.
• Travel to Lanayru Province using the new column of light.
• Search for Zelda in Lanayru Province.
• Look for an entrance to Lanayru Mining Facility.
• Travel through Lanayru Mining Facility to the Temple of Time.
• Show your new harp to the old woman at the Sealed Grounds.
• Respond to the event happening in the Sealed Grounds.
• Find out more about the Ballad of the Goddess in Skyloft.
• Unlock the mystery of the Ballad of the Goddess told to you by the headmaster.
• Investigate the location the Light Tower has illuminated.
• Follow the guidance of Farore’s Courage to the first Trial Gate.

Am not going to give the full details, you’ve been spoiled enough. However, if you are really curious on the plot head over to Nintendo Gazette for the entire summary of Skyward Sword.

Source: Nintendo Gazette