"Look, I don't know who you are or WHY you're up my ass, but can you kindly get the fuck out?" "Look, I know you don't know us but please listen.. is your dad John Winchester?" "Yeah..." "Okay. I know you're not gonna believe me but, that's our dad too." "Yeah okay, totally! I barely knew my dad, and I think If I had two older brothers he would of maybe told me." Sam and Dean are out hunting their demons, and ghost when they discover they have a long lost sister their father never told them about.