Melanie Walker has lived her life as a hunter. Her parents dropped her on Bobby Singer's door step when she was five and never returned. Bobby raised her and trained her to hunt until she turned eighteen and finally let her go out on her own. He's always protected her, but when he sends Melanie to find the Winchesters she is pulled into an undeniable fate. Melanie has the ability to destroy the world or save it. Which will she choose and can the Winchesters and Bobby save Melanie in time?