Abby and Carter travel to Oklahoma to rescue Abby's mentally ill mother (Sally Field) and bring her back to Chicago. In Chicago, Maggie suffers from a sleeping pills overdose. At County General, Kovac frantically revives her. Benton treats a college student injured in a fraternity prank. Benton also treats his former high school teacher, who first awakened his interest in science. Corday gives birth to a beautiful girl, Ella.