Song Qingci appears cold and aloof, but in private she is the writer "Sanqing Wife". Jiang Linye, her childhood sweetheart who lost contact for four years, returns to China and stays at her house as a guest, accidentally binding an inner voice system to hear her bold inner monologues. Because of a misunderstanding, she wrote her childhood sweetheart into her source material. On the surface, the childhood sweetheart obediently calls her elder sister, but inside he teases her step by step. The triple misunderstandings from four years ago are unraveled layer by layer, moving from a tug-of-war where you are in the dark and I am in the light to a reunion after a broken mirror. Her inner voice is exposed, and the cold elder sister was caught writing stories by her childhood sweetheart.