Dean (Jensen Ackles) and Sam (Jared Padalecki) finally found their father John (Jeffrey Dean Morgan), but in order to save Dean, John was willing to go deep into hell, leaving the two brothers to continue to complete their "hunter" duties. At the same time, the brothers also learned of the existence of the "yellow-eyed demon" and began to track down this biggest enemy all the way. The two solved one supernatural creature after another, and the differences in the characters and ideals of the two brothers have always existed, and they quarreled from time to time. But Sam is the only target of the yellow-eyed demon after all. In order for Sam to survive, Dean did not hesitate to make a deal with the devil and exchange his soul for Sam's life...