Bobby Singer spent twenty years keeping his greatest secret "off the books" to protect her from the life of a hunter. But when Sam and Dean Winchester show up at the salvage yard looking for their missing father, the lie falls apart. Raised on grit and sarcasm, Bobby’s daughter must navigate a sibling dynamic with the boys she barely remembers, while harboring a dormant power that even Bobby can’t explain. The family business just got a lot more complicated.