Danny has a lot to tell Mindy, but he doesn't know how. So he writes her letters.

Castiel is a fallen angel trying to fit into normal life. When he makes a pie for his new neighbors, he meets Dean, a demon, and things only get complicated from there.

Dean has a rule stating that he must not be single on Christmas. Castiel thinks it's stupid.

After long years of solitude, with no one but his two daughters by his side, Dean comes across a confused man in a bookstore. Dean makes a connection and allows himself to hope again, until he learns the truth about Castiel.

Dean and Cas are growing used to their new home in California. ('The Bet and The End' one shot)

Dean is a regular boy-next-door type of guy. That is, until the night he is possessed, hit in the head, exorcised, and carried into the safety on an old Impala by a hunter named Castiel. After learning of the existence of supernatural creatures, much to Dean's dismay, he is unable to get rid of Castiel.