Due to a sudden change in fate, Su Wanqing, who was supposed to go to her ideal school, was forced to bid farewell to her hometown and settle in a remote mountain village. The road to school was full of ups and downs, but she never put down the book in her hands. Here, she met Lin Yuchuan, a young man who was also hit hard by life. Two peers who have gone through ups and downs, accompany and encourage each other to persevere in their studies in the days of poverty. The family slowly got out of the predicament, and the two of them always walked towards the sun. Even in the mud, they still rely on enthusiasm and persistence to move step by step towards a sunny future.