Upon arriving, you’ll find a bunch of Bokoblins around the area. Go ahead and slice-‘n’-dice them, then head towards the temples and up the vinery. You’ll soon find Gorko near a group of several Blessed Butterflies. Speak with the former and play the Goddess Harp near the latter to make a Goddess Wall. Gorko will then ask you to draw a shape (an arrow, if not random), which causes about 30 Arrows to appear if done properly. Gorko then will ask you to come back to help him out later, when the power of the Goddess Wall regenerates, as it does for all.
Anyhow, go into the temple nearby.