On a routine mammogram one year after a simple breast biopsy, a mysterious piece of metal is found embedded in writer Amy Lambert's breast. Amy becomes consumed by a desperate search to determine how and why this bizarre thing got there. At the same time, she must discover the identity of a violent, threatening stalker intruding into her life. But the closer Amy gets to the answers, the more it imperils the lives of herself, her friends, and her family. In the exciting climax, the truth is exposed and Amy's entire world is turned upside down as she fights for her life and the lives of those she loves.