On a mission to save their father (Jeffrey Dean Morgan) from Meg (Nicki Aycox), Sam (Jared Padalecki) and Dean (Jensen Ackles) seek help from an old family friend, Bobby (Jim Beaver). When Meg shows up on Bobby's doorstep, the brothers lure her into a trap and exorcise the demon from her body after learning where John is being held prisoner. While trying to rescue John, the demon shows up and a full battle ensues between the Winchesters and the demon they have been searching for all their lives.