Foundation

(sister!fic) Sam and Dean Winchester. Saving people. Hunting things. The family business. Family. The brothers get a huge surprise when they realize that their family tree is a little bigger than they first thought. Dealing with vengeful spirits, demons, and disappearing dads, the Winchesters have trouble keeping up the fight. Sam and Dean, meet Scarlett. Set after 1.19, before 1.20. Will go episode by episode, with a few changes.