Make a frame base post

Hi
I want make a frame base site
That i can show in main page, Title and Summary of Entry… but when i click on read-more a page be open in my site that a External link is load on this… Like iframe…
forexample my site is http://www.mysite.com
and Entry link is http://www.mysite.com/link/2230
and on this link is a iframe tag that load a page of another site like http://www.anothersite.com/link/25/01/entry123

is there any plugin for this?

tnx