looking for a plug in.

Ok im looking for a plug or widgit that will show posts that are related only to the page that is displayed. I would prefer to make a page that is dedicated to a certain topic… say i have a site on trucks and the page is monster trucks i want only the monster truck category and its posts to be seen. is that possible? I looked into inline articles but didnt find anything that suited what i was looking for…I might just have to settle for using a series i don’t know… any help would be appreciated.