Two men known as "the Berlin Patients" revealed answers to a functional cure for HIV, twelve years apart. Each received his own treatment and each resulted in a new field of investigation, sparking hope for the 34 million people currently infected with HIV. Nathalia Holt, award-winning research scientist and HIV fellow at the Ragon Institute, tells the story of this cure and the politics behind it. The book is an unprecedented look at how scientists pursue their inquiries and the very human impact their research has.