An Evening with Professor Snape

Pippa Drake is an Australian born witch. But the thing is, she was raised like a muggle. She spent her entire life trying to find out the truth about who she was and why her parents isolated her from the wizarding world. She decided to get a job at hogwarts, a place where she knew she could find the answers.
She meets an unlikely friend, the sleek and mysterious Professor Snape whom, with his eventual help, finds that Pippa is more important to the survival of the wizarding world than she could have ever imagined.

All events, characters and references to the Harry Potter universe belong to J.K Rowling.

Also note that my story doesn't exactly follow the original, as some characters and events do not match up.