Henrietta Lacks, a young African American mother of five, unwittingly changed the course of medical history through her cancer cells. Born in 1920, she led an ordinary life in rural Virginia, working as a tobacco farmer. Skloot poignantly portrays her life, hardships, and joys, painting a vivid picture of this remarkable woman.

In 1951, Henrietta sought medical help at Johns Hopkins Hospital for abnormal pain and bleeding. Doctors discovered an aggressive form of cervical cancer, and during her treatment, they took a sample of her tumor without her consent. These cells, named HeLa after her initials, exhibited an extraordinary ability to grow and reproduce indefinitely in the lab. This unique quality made them invaluable to medical researchers.

HeLa cells went on to revolutionize the field of medical research, contributing to groundbreaking discoveries such as the polio vaccine and in vitro fertilization. Henrietta's cells have traveled to space, been exposed to nuclear testing, and even led to advances in cloning. They have been bought and sold countless times, generating millions of dollars in profit for many companies.

Yet, despite the enormous impact of HeLa cells on science and medicine, Henrietta's identity remained unknown for decades. The author recounts how she tirelessly researched and interviewed various individuals to uncover the enigmatic woman behind these powerful cells. Through her investigative work, Skloot not only brings Henrietta Lacks to life but also highlights her enduring legacy and the vital role she played in shaping the modern world.

In her portrayal of Henrietta, Skloot emphasizes her humanity, reminding us that behind every scientific breakthrough lies a personal story. Henrietta's tale illustrates the critical importance of recognizing the individuals who contribute to scientific progress, ensuring they are not forgotten or overshadowed by their own cells' immortal existence.