Bodhi Patel is the brand new Lead Epidemiologist for the world's top epidemic specialists, Global Health Agency, but there's no time to settle in: his new boss, Helen Taylor, deploys GHA to contain a mysterious new killer virus spreading from Peru into Brazil. On the ground they learn that the virus is loose in a region controlled by a heavily armed drug warlord, and the race against time to discover a cure just got a whole lot tougher. Meanwhile, Bodhi finds himself with a newly reshuffled team still smarting from the changes, including his ex - the last person he expected to be working with.