John gives Chet his guitar. At an explosive structure fire, a girl's horse is trapped in a burning barn. Dr. Brackett and Nurse McCall lecture a man who keeps forgetting his insulin shots. A girl calls the hospital, threatening suicide; firemen stand by while hospital workers attempt to trace the call. A hostage in a bank robbery has heart problems; the paramedics must treat him at gunpoint.

Roy and John finally restore their old fire engine to ride in the California Fire Fighters Parade. A man with heart problems insists on driving, and causes an accident for which the other driver blames herself. Dr. Early treats a patient who has a seizure in the waiting room. A man on a date passes out and has difficulty breathing; the doctors search for the cause. A child's medical condition causes an argument between his divorced parents. Driving to the parade in the old engine, the paramedics respond to an actual emergency.