In preparation for her wedding the next day, the younger sister decides to stay at her older brother's house, which is close to the wedding venue. Memories of the older brother come back to her, and the brother and sister suddenly feel lonely, so they give in to those feelings and end up having a physical relationship. They know it's wrong, but are unable to let go, and the brother and sister engage in incestuous relationships over and over again. The younger sister gets married, leaving their forbidden relationship of passionate love as their final memory.