Hawkeye returns from R&R to find out Trapper has been discharged. He rushes to the airport to say goodbye but misses him. But it gives him an opportunity to welcome Trapper's replacement, B.J., to Korea.
It's a bitterly cold night, and Hawkeye and B.J. are stuck with the overnight shift and a roomful of unruly patients. In the meantime, Margaret tells Frank that she keeps all his love letters--so he ransacks her tent to get them back.
The 4077th takes in Nurse Cratty's Korean orphans during a shelling attack, including a pregnant girl with a bullet wound. But Frank accuses one of the orphans of stealing his newly (and dubiously) awarded Purple Heart.
The latest group of casualties includes a bomber pilot who claims he's Jesus Christ. Frank and Margaret think he's faking battle fatigue in order to get a discharge, and they bring in Colonel Flagg to help expose him.
Hawkeye saves the life of a colonel who wants him reprimanded for disrespect. B.J. tries to save the marriage of a friend who found out his wife is cheating on him, and Frank is paranoid that all Koreans are hiding or burying bombs.
The 4077th introduces a "soldier of the month" award, which includes a week of R&R in Tokyo, and Klinger and Radar go all out to win the honor. Frank is supposed to choose the winner, but he contracts a rare fever.
Hawkeye Pierce, going solo, has an accident with a Jeep, and is rescued by a South Korean family. To prevent himself from succumbing to a concussion, Hawkeye begins talking endlessly to the family, who can't understand a word he's saying.