Literary agent Nathan Bransford has an excellent post on what constitutes plot.
What is Plot?
Published by Norm Benson
My name is Norm Benson and I'm currently researching and writing a biography of Walter C. Lowdermilk. In addition to being a writer, I'm an avid homebrewer. I'm also a registered professional forester in California with thirty-five years of experience. My background includes forest management, fire fighting, law enforcement, teaching, and public information. View more posts
Nullius in Verba 
Good old Nathan sure does have a way of boiling it all down. I frequent his blog as well, although I don’t post very often. Thanks for the comments on my blog about the Konrath book.
He does indeed.
You’re welcome for the Konrath comments. I know you’ll like Evanovitch’s stuff better.
Hey, when I click on the second link I get smouldering guy again!
Whoa! Sorry Lexi!
I know you like the guy but I have no idea how he got into this post. I use Scribefire on Mozilla’s Firefox but I suspect it’s simply operator error.
I’ve spot checked the links on the posts on either side of this one and they’re good.
I’ve fixed the links so that they go to Nathan Bransford’s blog and not to “The Passionate Pen’s” blog.
Thanks for the link. I enjoyed the plot post.