On the day marking their one-month anniversary, Miro suddenly vanishes. Hyoeun, who had been waiting believing Miro would come back to him, starts to lose hope and begins questioning himself. Why did he leave me? Seeking answers, Hyoeun wanders, convinced he's still within a maze. Inside a broken phone left by Miro, there is something. Determined that he won't return for a long time, Hyoeun sets out following Miro's traces.