Health officials in Albuquerque, New Mexico face an outbreak of a rare and fatal blood disorder. Patients suffer sharp muscular pain, fatigue, fever and rashes. Twenty-one people die from the illness. Five other states report similar cases. The epidemic is spreading. The Center for Disease Control assists federal and state health officials in their hunt for the cause. After six months of relentless investigation, researchers unravel the mystery. Those who suffered the illness have inadvertently given it to themselves. A contaminated batch of a dietary supplement sold in health food stores across the country is the culprit.