Psychologist Lin Zhixia accidentally inherited the old house of her distant aunt, but discovered that there was a "corridor" hidden in the house that could reflect other people's memories. Those forgotten obsessions, concealed truths, and cherished tenderness all echo repeatedly in the light and shadow of the corridor. As visitors enter the old house one after another, Lin Zhixia not only has to help them sort out the puzzles of their memories, but also faces the shadow of her own childhood that has been buried for many years. When the boundary between memory and reality gradually blurred, she realized that what echoed in the corridor was never the afterimage of the past, but the unaccepted self.
