What slider plugin is this site using? (Refinery29)

This website (refinery29.com) has a pretty neat slider that I admire and would like something like it. Here is an example of what it does: https://www.refinery29.com/small-space-bad-design#slide

The slide allows you to create a page topic per image and it changes when you change the image, giving it a professional yet sleek design. I have searched and cannot seem to find this plugin (If they are evening utilizing WP) or anything like it.

Would appreciate someones freetime.

Regards,
Ryan