It was a miracle--until a killer turned it into a weapon. When Dr. Chris Collins's estranged father, Wayne, shows up asking her to donate a piece of her liver to save his life, Chris balks. The man walked out on her and her mother twenty-nine years ago, and now he expects her to undergo major surgery and have part of a vital organ removed. She refuses. However, she can't just let him die. So she contacts Dr. Michael Boyer to get Wayne accepted into Boyer's experimental transplant program. The surgery is risky, and the source of the donor liver shocking. However, Wayne has no other choice. It's his only chance to live. The celebration of Wayne's stunning recovery is cut short when two of the nurses on the transplant team suddenly die horrifying, painful deaths. Chris's father has become the unwitting breeding ground for a rogue virus that may be unstoppable. As Chris and Michael Boyer search desperately for answers, a potential epidemic worse than any the world has ever experienced gains momentum. If the virus doesn't kill them first, its creator will.