Liu Lian worked as Ling Ran's substitute for three years, imitating Bai Yueguang's smile in his heart. She thought that as long as she was well-behaved enough, she could eventually warm up her cold heart. But when Bai Yueguang and Song Wanqing really returned, Ling Ran only saw the old person in his eyes. Liu Lian decided to leave and transformed from a humble stand-in into an independent woman. And Ling Ran finally discovered that losing her was more painful than never having her. Bai Yueguang or the substitute, who is the light at the top of his heart?
