For parents Miguel Sancho and Felicia Morton, the discovery that their son, Sebastian, has chronic granulomatous disease (CGD) upends their lives and leaves the family with few options, all of them terrifying. The quest for a cure leads them into the alternate universe of the rare-disease community, and to the cutting edge of modern medicine, as their personal crises send them fumbling through various modalities of self-help, including faith, therapy, and meditation. Sancho's riveting tale of the diagnosis and treatment of his son's illness takes us deep inside the workings of the immune system, and into the radically innovative treatment used to repair it. Ultimately Sebastian is saved with a stem cell transplant using discarded umbilical cord blood, a groundbreaking technique pioneered and practiced by the medical wizards at Duke University Hospital.