Exit Zora's Domain and head back to Castle Hyrule. Once there, you'll get a movie showing Princess Zelda being taken away by Impa (her guardian). Zelda throws something into the moat. You'll also meet Ganondorf on his horse.

Go to the moat and dive down and pick up the OCARINA OF TIME (we have a title!). You will learn the SONG OF TIME. This song is used in front of the altar in the Temple of Time.

Go over the drawbridge and head right of the Happy Mask Shop to enter the Temple of Time. Step onto the red carpet in front of the Altar and play the Song of Time. Enter the door that it opens.

Go up to the Master Sword and hit "A" to Grab it. You'll get a long movie explaing some stuff, blah, blah. You will receive the LIGHT MEDALLION. After all of the cutscenes, leave the Temple of Time. You will see quite a different Castle Hyrule...it's been decimated and has entered dark times.

Now, you need a horse and you need to make your way to the Forest Temple.