Gu Shenlan has been in love with Leng Weiliang for seven years, and Leng Weiliang has been in love with Gu Shenlan for two years. They first met when they were ten, met when they were thirteen, and fell in love at fifteen. Their love was pure and beautiful, but they didn't expect that the cold and ruthless world would easily destroy all their dreams and love. When they met as strangers, he looked at her deeply: "Ah Liang, remember, the deep sea is not cold."