They walk among us. They are like us, yet they are special. They don't know it, and many of those chosen and tagged never will. Others may find that one day their lives are over—for they have something that others want, and those 'others' will get what they want.

Emily Riley was one of those tagged. Unlike most, she found out about it, because the man who had tagged her was killed while watching her soon after.

And that was just the start of her troubles. For she had been declared the valuable property of someone she didn't even know existed. A living, breathing repository of organs and tissues, living a moderately ordinary life, ready to be harvested whenever it became required.