How do I use this plugin on custom page?

How do I make this plugin work on pages where normal theme/plugin codes are not used?

I am using a plugin that "shows the content only". It pretty much gives you a custom url to view the the_content without any theme/plugin files, so its just the raw code of the_content.

An example url is http://www.example.com/post-title/?content-only=1 whereas ?content-only=1 makes only the content load.

Anyways.. I want to use this plugin on this page and I need to know what code I need to add for the pop up plugin to load and show up on this page.

Thanks!