He was a salty old sailor, weather-beaten superstitious and in desperate need of money. So he sold three pints of his pure red blood -- and the horror began... First, the brutally mutilated bodies of a honeymooning couple are found at a campsite. Next, a highly reliable nurse commits suicide during her night shift. Finally, a sudden outbreak of a flu-like virus threatens to become an epidemic. Dr. Rachel Adams searches for an answer in a deserted hospital laboratory -- while the only clue flows freely in the sailor's tainted blood...