A Congressional aide, Williamson, visits the 4077th on a supposedly routine fact-finding tour, but it's discovered that his motives are far deeper - too uncover Margaret as a communist sympathizer. His case is full of innuendo, so the gang set out to help Margaret.
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.