Tiles & Paged Pagination – Where’s the remaining description?

Hi. Love the look of Tiles & Paged Pagination. How and where do I create the page that appears after I click on a single photo within my portfolio?

I’ve got my portfolio page set up properly, but the description does not continue to the second page. It’s the photo only. My goal is to achieve the same thing as your site example… once you click on the photo (with an excerpt of the description on a black background), the photo takes up a full page with the entire description revealed. Can’t get the rest of the description to appear.

Thank you so much for you help!