So, this is a thing... I was just saddened by the lack of Supernatural/Castle crossovers and after watching the episode of Castle, "Demons," I had the inspiration for this thing. I'm not sure how long it'll be or anything, but the Winchesters will eventually show up. This is, of course, AU for Castle, and I haven't decided where in the spn timeline this will be. Enjoy!
disclaimer: I obviously don't own either of these shows.
A nineteen-year-old Kate Beckett watched in horror as her mother fell, blood pooling around her body as the killer added a few more expertly-placed stabs in her already lifeless torso.
She had run into her mom on the way home from the grocery store in front of the dark alley. When a rustling was heard, Johanna pushed Kate into the shadows and whispered for her to stay quiet. It took everything she had not to cry out, but, as it were, she let out a soft, choked sob as Johanna's body hit the pavement.
The man leaned down to clean his knife on his pants before hearing Kate's voice, standing up, and smiling. Kate held her breath, but it was too late. The man was advancing.
Nearby, a cloud of buzzing black filth floated in the air, watching the scene with one part interest and one part mild worry. She wasn't sure what it was about this family, but she had carefully watched each family member for a few weeks and had grown quite attached to each one. Johanna Beckett's death angered her, and she felt an odd need to protect the young woman cowering in a corner. She hasn't determined the reason why yet. Perhaps it was that she had grown tired of destruction and longed for a taste of that long-forgotten humanity. She had, after all, lent a hand in the crucifixion of Christ, caused the fall of Pompeii... Oh yes, they were all her. Ordered by a higher-up, but it was her expertise that carried out the plan to bloody perfection.
She was jarred from her thoughts by the young Beckett's screams as the man stabbed her once from an angle that, the demoness calculated, would cause her to bleed out slowly. Quickly, the black cloud found her way into Kate's body, encountering her fading soul. She concentrated on healing the wound, but she was too late. The young Beckett was fading quickly. I will spend your life as you would have. What do you want your life to be?
Kate's last thought before fading into nothingness was avenge my mother. Find her killer, put him behind bars. And stand up for the voiceless. Just like she did.
So the new Kate stood and ran as quickly as her legs would carry her away from the alleyway, making certain anything tying her to the scene was cleared away. Kate Beckett never saw her mother die. She didn't know her mother was dead until she saw Detective Raglan at her house with the news. She cried with Kate's father, and she didn't even feel out of place. Slowly, she absorbed the memories Kate held dear and, without realizing it, became Kate. She closely followed each step of the case, grimacing when the detectives on the case overlooked obvious things, rules the case a mugging, and shoved it away in the back of a filing cabinet that wasn't even alphabetized. She resolved to become a detective. That was the best way to honor Kate's dying wish. She would become a homicide detective, speak for the voiceless, and solve Johanna's brutal murder.
Hope you liked it! And, as goes for every story on here, please review. Reviews are like lifeblood. They make me eternally happy.