A lot like the brothers, Sam and Dean, Kaya and Kate travel together, saving people and hunting things, carrying on the family business.
After the girls' Mother's disappearance, they traveled a lot with their Dad, learning how to fight and hunt along the way. After the girls were old enough, their Dad left them with Bobby to search for their Mother alone. Kate understood but Kaya was angry with him for up and leaving them which caused a lot of problems between the two girls so Kate and Kaya split ways... until now.
Mary Winchester was killed by a supernatural force and now, her husband, two sons, and only daughter are obsessed with finding it and killing it 22 years later. Only one of the Winchesters isn't willing to have the hunt consume his life.
When John Winchester goes missing, Dean and Faith know they need Sam's help in finding him. Will Sam be able to reconcile his differences with his brother and sister and help save their father?