Margaret, calling from Tokyo, holds the camp in suspense until she returns with the news of her engagement to Lieutenant Colonel Donald Penobscott. Frank Burns takes the news hard and arrests a Korean family as spies.
Following an offer of promotion made by Master Sergeant Woodruff at a poker game, Radar is promoted to the rank of lieutenant. Finding this position awkward, Radar opts to return to his position as an enlisted man.
A former star college football player suffers a severe leg injury in combat and must deal with the consequences, and Major Burns goes behind Colonel Potter's back to set up a boxing match between Klinger and Zale.
Hawkeye and BJ try to stop a chopper pilot from selling souvenirs derived from war materials derived from locals facing danger getting them, and Klinger becomes a pole-sitter in his latest attempt to get a Section Eight.
Pressured by Frank, Margaret decides to marry Colonel Donald Penobscott at the 4077th. When Donald arrives in camp, he is treated to a bachelor party and a practical joke while the nurses give Margaret a bridal shower.