A famous and mad genetic engineer, Zobrist creates a virus for rendering a third of human population infertile. He says it’s the only way to cope with humans’ overpopulation issue in Earth.
Robert Langdon, Sienna and the head of WHO (World health Organization), Sinskley are trying to locate a virus and possible to neutralize it. But they couldn't achieve their goal for Zobrist already freed a virus.
At the end Sinskley proposes some great ideas and methods for solving the global problem in question.
Generally the book is full of historical description of Florence, Duomo (Italy), and Turkey.