Over fifty million people died when the Spanish Flu swept the globe in 1918. The virus attacked the young and healthy, dealing a crippling blow to a world still reeling from the horrors of the First World War. It wormed its way into communities large and small, killing mercilessly, before abruptly vanishing without a trace in the summer of 1920. That was then. In 2005, scientists completed sequencing the genetic code of the Spanish Flu. The following year, they infected monkeys with a reanimated strain of the very same virus. The monkeys exhibited classic symptoms of the 1918 Spanish Flu. Then they died. This is now. In the course of a routine transfer between government facilities, a team of ruthless mercenaries intercepts a supply of a highly engineered Spanish Flu virus. Gage Mercer, the future son in law of a deranged billionaire, finds himself drawn into a plot to trigger the extinction of the human race through a deliberate release of the virus. This could be the future.