Set right after 'Remember the Titans.' Dean has been praying to Castiel for weeks and he hasn't heard from the angel. Worried, he tries again hoping for different results. First dialogue taken straight from the episode. They are not my words.

Centuries after waiting for the reincarnation of his king, the time has finally come. Merlin is out to find Arthur to continue their journey to bring peace. In this modern era, would things be different or will history just repeat itself? After all, Merlin was born to serve Arthur. It was his destiny; they were two sides of the same coin.