Starla, a spirit who was banished from the Spirit realm is now trapped on earth,and now has to deal with everything that has to do with the supernatural up until she meets Sam, Dean and Castiel. Starla has a crush on Sam, yet she has to keep her spirit self from taking over. However, her dark side wants to take control, meaning she'll have a harder time controlling herself. If she wants to remain a Guardian Spirit, she has to join Sam, Dean, and Castiel on hunting trips, however, she fears that she may be a burden.