She, Lin Ziqi, is a blank piece of paper. He, Mu Zhirui, wrote a promise on this piece of white paper but broke the promise. She didn't wait for him, she just stayed where she was and forgot to move forward. When she finally remembered to move forward, he appeared again, tempting her to look back. He loved this time in his life, and so did she. However, it was so difficult to gain and lose, how could she bear an unpredictable future. This time, he came to give her a sense of security...