Five years ago, U.S. Army Warrant Officer Rachel Peng joined the Office of Adaptive and Complementary Enhancement Technologies, a top-secret federal agency which blended cutting-edge cybernetics with communication and information technologies. Today, OACET has gone public, its Agents revealing themselves to the world as cyborgs capable of talking to, and taking control of, any networked machine. Rachel's new job as the OACET liaison to the Washington D.C. Metropolitan Police is not what she would call fun. She and her partner, Detective Raul Santino, are usually bored senseless or are fighting with their coworkers.

Neither of them are prepared when a routine act of harassment plunges them into a murder investigation. And they certainly didn't expect for the evidence to point directly at Rachel and the other cyborgs. The murder is only the beginning. Soon, Rachel and Santino find themselves deep in a game of cat-and-mouse with a killer and his hidden agenda. The killer has planned for every contingency, every possible outcome. except one. Rachel herself.