I found the missing subplot in my WIP. Now I just have to layer it into what I've already written. And that means a lot of cutting scenes and rearranging them. Which gets confusing when you know the whole story because you can accidentally refer to stuff that won't happen for another chapter or two because it used to happen earlier.
As I'm fixing/rewriting scenes I see the stuff that really didn't fit. Putting this subplot back in makes everything work so much better. I had tossed in a mini-plot that sort of made sense, because I knew it needed something, but it never really meshed. It implied a larger theme that I had taken out because that didn't work either. So dragging in a piece of it just made a bigger mess.
It's going a bit slower than I had hoped. Although I know what needs to happen, I have to figure out how to introduce it into the world in a logical manner. In the great doorstop it was a major info-dump that ran a whole chapter. Yikes. Now I not only want to avoid that kind of delivery of information, I also want to delay the full disclosure and extend the mystery. So in addition to the action, I need to weave the information in slowly.
And that means writing, which I need to go do now.