The air conditioning quits on the hottest day in October. Coupled with closed ERs in two other city hospitals, the end result is an extremely hectic day. With his wife out of town and the babysitter experiencing car trouble, Mark is forced to bring Rachel to work with him. Doug treats a five-year-old suffering from a cocaine overdose. Ivan, the liquor store owner, shoots and seriously wounds a young teenager. Susan's sister Chloe drops by, wreaking havoc in Susan's life and absconding with a number of valuables. Doug hooks up with a pharmaceuticals representative.