Octavia Philamonica has always had a nice, quiet life in Canterlot. After getting attacked and gravely injured by unnatural beings, a dark figure comes to her rescue, but there was a catch. She was warned, but she took it anyways. Now the calm, collected Octaiva is now a Vampony and works for a secret organization ran by the princess of the night made to track and kill dangerous monsters along side other Vamponies and Ponies.

As she follows around her master, a one Fluttershy, she slowly learns how to give up her old Pony ways and to embrace her new, darker powers as a Vampony.