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.
The nurses go behind Margaret's back so that a fellow nurse confined to her tent can spend the night with her soldier husband who is paying her a surprise visit.