Photo by Sylvia Duckworth (cc)
A spiders web begins with a frame. It works, creating the structure as it goes along, but it knows what will strengthen it is the detail.
It travels round and round. Spinning it's thread into the image it needs, but knowing the truth can't be seen until the end.
But it still works. detail after detail. If it falters, it doesn't give up. It rests and returns to work.
We spin our story in the knowledge that it could fall apart at any moment, but we work. We push on with the fine thread of our plot, layering it with the detail we need. Until the day we step back and (hopefully) reveal something beautiful.
The structure holds it together, but it's all in the details that catch the reader in our story webs.