This story follows John and Aileen Crowley and their three children, the two youngest of whom have a rare "untreatable" genetic disease. Pompe disease gradually degenerates muscle until patients cannot breathe or sit up; it also dangerously enlarges the heart. Determined to try to save his children, John Crowley started up a biotech company to develop an enzyme that would replace the non-functioninging one in his children. Others researchers in other companies were trying different approaches. Everyone made mistakes and created problems along the way.

Finally, in "the mother of all experiments," the four promising drug developments were tested against each other in a double-blind trial. After five years of development, the "special medicine" was finally given to the Crowley children. Daughter Megan, a real fighter and outgoing personality, won over the hearts of the researchers. Interesting conflict of interest issues increase the tension in this race for a cure.