The 4077th Mobile Army Surgical Hospital is stuck in the middle of the Korean war. With little help from the circumstances they find themselves in, they are forced to make their own fun. Fond of practical jokes and revenge, the doctors, nurses, administrators, and soldiers often find ways of making wartime life bearable.
Everybody pitches in to save Colonel Potter's horse, who becomes sick while Potter is away in Tokyo. And Margaret asks Hawkeye, not Frank, to operate on her appendix.