Twenty two years ago Samantha and Deanna Winchester lost their mother to a mysterious and demonic force. In the years after, their father, John, taught them about the paranormal evil that lives in the dark corners and on the back roads of America... and he taught them how to kill it.
On the hunt for Lucifer, the girls find themselves in a small town in South Dakota where they meet Castiel- an angel with a proposition... Castiel sends them a very long way from home on a mission to uncover the secret Satan never wanted them to find.