This is the compelling and inspirational true story of a twentieth-century doctor and saint. Giuseppe Moscati, born of an aristocratic family in Naples, Italy, devoted his medical career to serving the poor. He was also a medical school professor and a pioneer in the field of biochemistry, whose research led to the discovery of insulin as a cure for diabetes.

Moscati regarded his medical practice as an apostolate, a ministry to his suffering fellowmen. Before examining a patient or engaging in research he would place himself in the presence of God. Moscati treated poor patients free of charge, and he would often send them home with an envelope containing a prescription and a fifty-lire note. He could have pursued a brilliant academic career, taken a professorial chair, and devoted more time to research, but he continued to serve his beloved patients and to train dedicated interns.

By the witness of his example, he taught his many medical students to practice their profession in a spirit of service, saying that "suffering should be treated not as just pain of the body, but as the cry of a soul, to whom another brother, the doctor, runs with the ardent love of charity.