I heard it before I understood what I was hearing.

  Luca's voice first, low, controlled, with that particular edge underneath it that I had learned meant something had interrupted a plan he'd already made, and he was deciding how much it was going to cost whoever was responsible. Then another voice answered him, and the moment I heard it every single nerve in my body went completely still, because I knew that voice. I had known that voice for six years. I would have recognised it through walls, through sleep, through the end of everything, it was wired into me in a way I had never examined too closely because examining it would have meant admitting things I wasn't ready to admit.