Nana was an outstanding lawyer, respected and trusted by her juniors. Her marriage was ideal, and she was admired by many. However, due to their busy work schedules, communication between her and her husband gradually faded, creating emotional distance. Amid this, the presence of a warm, supportive junior became her emotional anchor. One day, after drinking too much at a work celebration, the two found themselves in an unthinkable situation. Until then, Nana had always remained strong and composed, but touched by her junior's kindness—and seeing the vulnerability of the senior she once admired—something shifted. What emerged between them was a three-day romantic affair between a man and a woman. A new relationship begins, challenging the very bonds of marriage.