The multiple Emmy-winning ER examines the lives of the dedicated physicians and staff of an overburdened Chicago emergency room who are determined to save lives in a place where nothing is taken for granted and nothing is certain ... except that another desperate person will be wheeled through the emergency room doors in the next moment, in need of their help. Among the trials facing the doctors are a painful recovery from drug addiction, a devastating brain tumor and the unwelcome visit of an estranged mother.