M*A*S*H è una tragicommedia incentrata sulle vicissitudini del 4077th Mobile Army Surgical Hospital (Ospedale Chirurgico da Campo dell'Esercito) statunitense in Uijeongbu, Corea, durante la Guerra di Corea (1950-1953).
Molte delle situazioni raccontate, anche le più assurde, sono realmente accadute, come testimoniano molti dei veterani del conflitto.
Captain Tom Greenleigh of Stars and Stripes comes to the 4077th to write an article about Charles, which makes him act even more egotistical than usual. Meanwhile, Margeret finds out her estranged husband Donald has tied up their joint account, while fending off at first -- then accepting -- the advances of Greenleigh. Klinger dresses up as various movie characters with the hope that Stars and Stripes will write about how crazy he is.