@DtH4ever - You should apologize to Ryder. Check out the first chapter of his story "Harry Potter: The Other Child" on fanfiction.com. Then compare it to this one.
I think a total of 4 words were changed, those being people's names. An obvious case of plagiarism.
Now, from TheDemon's story summary, he may be taking this story in a different direction than Ryder's, but that doesn't excuse what he's done.