 A careless worker sparks an explosive fire in a high-rise building. Station 110 leads a full alarm response, assisted by Squad 51. A triage team from Rampart Hospital, led by Dr. Brackett, sets up in a nearby garage. Several workmen and two women - including the fiancée of a paramedic - remain trapped on the 16th floor. A Coast Guard helicopter assists in rooftop evacuation; Dixie and Dr. Early take charge of the many patients at Rampart. A paramedic is injured attempting a rescue, while Gage and DeSoto extricate themselves from a broken elevator. An explosion on the 21st floor injures a fire captain, necessitating a dangerous rescue down an elevator shaft.