When you arrive, after a short scene, head along the path and defeat the Deku Babas you’ll find on the path – a fairly simple idea, just slide ‘em. At the end of the path, you’ll need to drop down a ledge and watch the scene of the immense pit below you.
After this scene, go to the bottom of the pit, preferably using a combination of jumping off of a ledge and using the Sailcloth for a safe landing. Head to the pedestal and hit it with a Skyward Strike to remove the dark aura, which also triggers some air vents for easy upward travel. Use them and go towards the ledge you originally jump off of, then go towards the door nearby. Go on through to the Sealed Temple.