When young Jae-woo reaches the upper ranks of South Korea's national kendo team selection, he is shocked to learn his main competition is the man who accidentally killed his older brother.

Chanhui and Seyeong, a couple in a long-term relationship, find themselves tiring of each other as life becomes difficult. Chanhui wanted to become a photographer, but is now a salesperson in a camera store. Meanwhile, Seyeong works in a nail salon, feeling a lack of hope for the future. One day, Chanhui realizes that a financially secure man with a steady job has been showing interest in Seyeong. Needless to say, Seyeong, enjoys his attention. Not to lose his girlfriend to that man, Chanhui plans a trip to reconnect with Seyeong and refresh their relationship. However, their journey seems to go nowhere. While traveling, they constantly express love, open up more, fight with each other, and gain intimacy.

A revenge thriller film that tells the story of the pain of a brother and sister who were taken to Brothers Welfare Center in the past and punishes them directly because the law cannot punish them for their wounds and pain at the welfare center. Based on the webtoon of the same name by Lee Ik-su.