A Light in the Dark

Sam Winchester has been grieving both of his siblings for the past 4 months. When Dean comes back he is beyond happy, but isn't so happy that he has to tell Dean that Caitlin is dead. So, the brothers start hunting again while in the middle of the war between heaven and hell.

On the side of the angels is Caitlin. They have made her to be their weapon, which has been a pain in Lilith's ass. But Lilith has no idea Caitlin is still alive. Only the angel and Caitlin know she's alive. Caitlin only likes one angel. Castiel. He's kind to the demon. She often questions it, but he always responds with "you may be a demon, but you don't act like one." All the angels know that Caitlin and Castiel are good friends, but there's one thing the two are hiding.

Now, Caitlin is trying to break Alastair, but he isn't budging. Uriel has decided its time that Dean tries to break him. Which means Dean is about to find out that his sister is alive. Something Caitlin is unaware of.

How will the oldest Winchester respond to seeing her little brother again? And what is she and Castiel hiding from the other angels?