The nationally bestselling author of The Deep Zone returns with a heart-stopping new Hallie Leland adventure: a chilling tale of suspense set against the forbidding backdrop of the South Pole—perfect for fans of James Rollins and Brad Thor.

An international group of scientists known as Triage believes that overpopulation is dooming the planet, causing climate change, water scarcity, famine, pandemics, and more. For civilization to survive, the scientists conclude that the earth’s population must be reduced—drastically and without delay. But killing is not part of their agenda. Instead, they will genetically engineer and disseminate a common virus that is really a carrier for something much more sinister.

After the mysterious death of a colleague, microbiologist Hallie Leland is dispatched to the South Pole to continue her friend’s research. What she uncovers are alarming details of Triage’s plot, which pits her against forces more terrible than she could have imagined. Now, in one of earth’s loneliest and most treacherous places, where high altitude and extreme environmental conditions can play tricks on the mind, Hallie finds that she has only five days to stop the shocking plan from taking hold.