Final answer:
Locating a specific Harry Potter fanfiction can be challenging due to the vast number of stories available. It is recommended to search fan fiction sites with keywords, exact quotes, or to ask in dedicated fan communities.
Step-by-step explanation:
I'm sorry, but I do not have access to a database of fan fiction stories to locate the specific Harry Potter fanfic you are referring to. The nature of fan fiction means that there are countless stories out there, with new ones being created all the time. I would suggest checking fan fiction sites like FanFiction.net or Archive of Our Own, where you can use keywords or search by characters to try and locate the story.
If you remember any specific phrases or lines from the fanfic, you could try searching for those as exact quotes. Additionally, you might want to join and ask in Harry Potter fan fiction forums or communities, as the members there might recognize the plot and direct you to the story you're looking for.