After a year apart, Sam and Dean are reunited in the Eighth Season premiere. After escaping from Purgatory with the help of a vampire named Benny, Dean heads straight for Sam, but the reunion isn't exactly everything he imagined it would be. Although Sam drops everything to join his brother, leaving the life he had grown accustomed to enjoy turns out to be harder than he imagined. In the meantime, Benny's help turns out to be more than what Dean bargained for. As the brothers struggle with their unexpected reunion, they make a shocking discovery that could lead them on a deeply personal mission to settle old scores.