This is a story where your name is Elizabeth Winchester. You're Dean's adopted daughter. You usually hunt alone, but Dean and Sam needed help. You run into a strange boy with even stranger powers. He has eyes similar to Dean's and you immediately trust him. He takes you to a camp. One with kids as weird as him. While you try to fit in, Dean and Sam search for you frantically running into someone from your past. There is no darkness/mark of Cain. It takes place after the last book in The Heroes Of Olympus.
7 parts