An explosion at the main railway station in Barcelona rattles the city, the first strike in a complex and increasingly devastating terror plot. When scores of patients with no physical trauma require hospitalization, MI-5 agent Elizabeth Foster turns to trusted colleagues Jake Evans, a Stanford University epidemiologist, and Christopher Rose, an Oxford microbiologist and technology expert, to reveal the true nature of the threat: cyber terror. The team of experts chase clues and conspirators through Barcelona's beaches and back alleys. But will they successfully dismantle the plot before it brings down Spain's medical infrastructure, threatening visiting dignitaries, innocent civilians, and peace throughout the Mediterranean?