 Boston, Massachusetts 1985. Boonie s 18-year-old adopted daughter, Karen, meets with Dr. Richard, working in a birth clinic for pregnant women, to question him for facts about her real mother K.C. A flashback to 1966 shows a pregnant K.C. questioning her romantic involvement with Lt. Col. "Mac" Miller , which ends when he s wounded in action and sent home, and Lila arrives to replace him as commander of China Beach.