Series: Quis Custodiet
Fandom: Castle, Supernatural (no canon knowledge necessary).
Genre: Angst, Mystery, Supernatural
Details: Slash, genre!crack, crossover, case!fic, AU, blasphemy, mythology abuse, spoilers.
Characters/Pairings: Castle―pre-Kevin Ryan/Javier Esposito, mentions of Kevin/Jenny and Javier/Lanie. Kate Beckett, Richard Castle. Supernatural―Bobby Singer, Claire Novak, Amelia Novak, mentions of others.
Summary: When Javier Esposito went missing and the body of an unidentified woman was found in his apartment, Detective Kevin Ryan refused to believe the worst of his partner. Now, with the case threatening to go cold, he has embarked on his own investigation, determined to uncover the truth.
Notes: Early season 4 for Castle, and AU for season 6 of Supernatural, so spoilers up to there. Part of the "Quis Custodiet" AU crossover 'verse. Takes place a couple months after "'Aloha' Doesn't Mean 'Goodbye'" (SupernaturalxHawaii Five-0), but stands alone. In fact, I think this story is much better if read first.
Written for the July Ficathon on ryanandesposito.
Chapter One - Chapter Two - Chapter Three - Chapter Four - Epilogue