It takes me a while to realize that the high-pitched screaming I can hear is coming from me. I'm kneeling on the ground even though I don't know how I got there, and I'm clutching my head as I scream like the world is ending.

Over and over, I keep seeing Rachel drive that blade into that man's neck. I keep seeing his blood splash into the air. It doesn't stop, even when I close my eyes tightly.

People die so easily, I think, feeling my heart pound too fast. Why is it so easy for people to die?

I suspect that I'm in shock, but there's nothing I can...