大学昆虫学系的教授翔民和妻子奈彼此的个性就像油和水一样，无法融合在一起。翔民是大韩民国大男子主义的代表，总是不经意地挑战知奈的忍耐度，而知奈也不知不觉变得对翔民苛刻起来。终于有一天，两人无法忍受彼此的性格，决定离婚。分开前，两人把全部物品平分，翔民却要拿回以前送给知奈的东西，知奈生气地把自己最喜欢的东西还给了翔民。某天，迟钝的翔民像是忽然理解到了什么，于是决定约知奈再次见面。知奈的神经再次被翔民的性格触动，忍无可忍。接下来他们每次见面，知奈都会不自禁地气打翔民，踢他的脸，还放火烧他的车，最后更挥舞铁管…终于，两人宣布不再对话，直接进入全面的“战门”中，一场接一场地打架!最特别的情侣组合，“打架”的结果会是怎样的呢？

Arguing about everything is how Ji-na and Sang-min spend most of their time together. Nonetheless, at one time they vowed to overcome their clashing personalities and pledged for eternal love. But it’s a vow that was short-lived, and their “happily ever after” life became an unattainable fantasy. Though unintended, Sang-min’s continuing indifference to her is a constant source of aggravation to Ji-na, and putting up with Sang-min has made her a tense, violent woman. With their pent-up frustrations and grudges against each other unaddressed, they opt to end their relationship. Psychological warfare erupts when they disagree on every single issue. What begins as verbal sparring leads to physical conflict … with no end in sight.