Searching Together {A Sabriel Fanfic}

After a hunt gone awry, Dean's missing and Cas hasn't returned any of Sam's calls. Sam is hopelessly distressed and alone when suddenly he gets a knock on the bunker door.
Now, two brothers must find their missing siblings while struggling to deal with one another.

Cover art by cha-nis on Tumblr! https://cha-nis.tumblr.com