Father Mulcahy counsels a GI who is plagued by guilt because he has swapped tags with a dead colleague. Meanwhile, B.J. and Charles consider ways of keeping a soldier-salesman quiet.
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.