A film that toys with us as much as it plays with itself, A One-Sided Affair is a provocative exploration of current events. When famous composer, George Watson, dies he leaves his family in a dilemma: either they become the center of a national controversy or let his entire estate go to his cats. Tensions about the embarrassing topic rise when a right-wing newscaster stays under the same roof as the left-leaning, opinionated family.

Set in 1969 at the end of the Vietnam War, elite officer and war hero Colonel Kim Jin-pyeong is about to get promoted to general. He is a constant subject of jealousy, with the commander for a father-in-law and a beautiful wife. But in truth, his affection for his wife has subsided and he is suffering from post-traumatic stress disorder from the war. One day, Jin-pyeong encounters Ga-heun, the wife of one of his captains, and falls into a fatal and obsessive love affair that forces him to give up everything he had achieved.