Rosalie wasn't alone that night. She had someone watching her, Isabella. Going against orders Bella tried to save Rosalie, with her failure to protect the one most important to her she lost a part of herself. Bella goes to Forks to fulfill her task of killing 100,000 demons to regain what she lost. There she meets the Cullens,Hales, and Denalis. Will Bella stay or go once finished?

Isabella and Carlisle Cullen were brother and sister in the 1600's, both are turned to vampires. what happens when they meet up centuries later in a certain town named Forks, Washington. 'T' to be safe, first fanfic so please be nice and review, enjoy!