Myeong-ho (Hwang Hae), a middle school teacher who had grown up in poverty, and Bu-nam (Yang Hun), the first son of the president of a trading company, attend the same university. A doctor suggests that Bu-nam, who is sick due to overeating, and Myeong-ho, who suffers from malnutrition, should switch life styles for two weeks. While living in each other's house, they fall in love with each other's younger sister and get married at a joint wedding ceremony.

Shortly after Korea gained independence from Japan (1945), North Koreans decide to extort civilians' property in the name of revolutionalizing its land and settle class struggles for proletariats. The film depicts an anti North-Korean concept, detailing the country's situation after the independence. South Korea's submission for the Academy Award for Best Foreign Language Film in 1968.