The Outcast

Sarah is an Outcast, has been one all her life, but when she is responsible for Hiccup and most of the gang being captured, things start to change for her. Odd memories that she knows don't belong to her surface, and then a she finds a new species of dragon in the woods. Odd thing is, it knows her. Will she find the truth, or has she let Alvin win? (T because I'm paranoid)