Part one of two. The documentary returns to follow the day-to-day realities the NHS faces in tackling the coronavirus pandemic, following staff and patients at London's Royal Free Trust from the first day of the lockdown. The Royal Free Hospital's emergency department is inundated with patients displaying symptoms, among them 88-year-old Peter, who is struggling for breath. He is quickly put on oxygen and moved to what was the coronary care unit, but has now become a ward for covid-positive patients