Intro. Bobby's daughter Hannah Singer grew up alongside the Winchester brothers — Sam, Dean and even John — learning to hunt all kinds of supernatural creatures. Even with her father trying to get her away from that dangerous life, Hannah was always the only one who found it all really interesting.
She got along well with everyone... except with Dean Winchester. His sarcasm, provocative manner, and mania for not taking anything seriously made her mad. The two lived at odds, as if they hated each other — but, deep down, the hatred was just a distraction to hide the chemistry and feelings that neither of them wanted to admit.
When Hannah was fifteen, a powerful demon—more dangerous than any they had ever faced—nearly killed them all. After this attack, Bobby decided that his daughter needed to leave. He sent her to another country, far from all the madness and danger of the hunter's life.
Five years later, already twenty years old, Hannah decides to return.