The year is 1951. Six years have passed since the conclusion of the Second World War, and another conflict has broken out – this time in the Korean Peninsula. North Korea, with the support of China and the Soviet Union, fights against South Korea, whose citizens are backed up by the United States and her allies. Just like in the Second World War, the army has made extensive use of the Mobile Army Surgical Hospital (MASH) – a fully functional medical unit deployed in the combat zone. The 4077th of these units is about to shaken up when its two newest surgeons, “Hawkeye” Pierce and “Duke” Forrest arrive in a stolen Army Jeep.
Osamu is a day laborer who has been forced to leave his job following a severe injury. He is a member of an impoverished family in Tokyo. He lives with his wife Nobuyo, sister Aki, nephew Shota, and grandmother Hatsue. As a way of saving money, Osamu and Shota routinely shoplift goods, using an intricate system of hand signals as a means of communication. One night, they see Yuri, a girl from the neighborhood they have regularly observed locked out on an apartment balcony. Feeling sympathy for her, they bring her to their home.