A race-against-time thriller, as one man must find the origin and cure for a new killer virus that has brought the world to its knees. At an internment camp in Indonesia, forty-seven people are pronounced dead with a mysterious fever. When Dr Henry Parsons - microbiologist and epidemiologist - travels there on behalf of the World Health Organization to investigate, what he finds will soon have staggering repercussions across the globe: an infected man is on his way to join the millions of worshippers in the annual Hajj to Mecca.