Three years into her marriage, Ayumi commutes daily to a dispatch agency by bus. Before marriage, she worked as an office lady and used the same bus route. Her husband first met her when he rescued her from a molester on that very bus—an event that left a deep impression on the young woman at the time. Now, history repeats itself as Ayumi encounters another molestation incident during her commute. The perpetrator turns out to be the same man who attacked her three years ago, causing her to lose her job back then. That past incident was believed to be an act of revenge, but hidden truths behind it are about to surface. This time, the man declares revenge with handcuffs and begins tightly binding her with rope. Yet, deeper secrets still lie buried beneath this case, driving the story into darker, more intense territory.