Dr. Borelli visits the 4077th to demonstrate his artery transplant technique. Unfortunately, being so close to the front at the 4077th causes Borelli's drinking problem to interfere at the worst time - when a patient needs the transplant.
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.