A teen with a troublesome injury is brought to the doctors at Seattle Grace. Turns out she's the latest victim in a case handled by a certain Boston detective/medical examiner team.

After Casey's death, there's really only one person who can pull a certain brown-eyed detective out of her stupor. AU.

"Thoughts swirled in her head, and it was tough to try and grab hold of one to verbalise. Disappointment, betrayal, and pure, undiluted hurt seared through her veins, and she could feel her hands shaking from the unstable cocktail of emotion. This was not the Castle she knew." Spoilers for 4x23, 'Always'.