Thirty years ago in Ireland, a man is killed after hearing a strange noise and being attacked. His wife banishes the creature but also dies, leaving only their baby alive. In the present day Sam and Dean investigate a case in a retirement home where one of the residents died in a similar manner. A resident named Mildred sees the creature commit its second kill of the building manager. The brothers realize the creature is aBanshee, driving its victims insane with its voice before feeding on their brains. Sam is briefly captured by a deaf woman posing as a housekeeper named "Marlene". "Marlene" was the baby who was raised by a hunter after her parents died, her real name is Eileen and her grandfather was a Men of Letters. The banshee's screams also destroyed her hearing. Posing as Castiel, Lucifer searches the bunker for a way to kill Amara bella confornt him and Dean admits his connection to her but asks to keep it a secret from Sam. "Castiel" agrees saying maybe they can use this to draw Amara out. Assuming Mildred is the next target, the Winchesters and Eileen protect her but are caught off guard when the banshee targets Dean. Mildred and Eileen are able to kill it. Eileen continues hunting while Mildred assumes Dean is attracted to someone out there. Later, Sam admits how Lucifer taunted him and apologizes for not looking for Dean while he was in Purgatory. Dean had forgiven him a long time ago. Sam is able to rest soundly, but Dean is still tormented by his thoughts.