Jiahao (played by Zhang Ruijia) has been full of fantasies and desires for the endless sky since he was a child. With the dream of soaring in it, Jiahao chose to enter the Air Force School when he grew up. Although the study and training are very hard, the feeling of getting closer and closer to his dream is so wonderful. Xinyi (played by Xu Weining) and Jiahao have the same dream. One day, they met at the graduation dance. Xinyi's gentleness and kindness made Jiahao feel moved. He immediately launched a fierce offensive against Xinyi and finally won Xinyi's heart. However, bad luck came, and the disease made Xinyi gradually lose her eyesight, which meant that she would bid farewell to the sky and could no longer realize her dream. In order not to drag down Jiahao, who had a promising future, Xinyi chose to leave. However, in the face of Xinyi's cowardice and retreat, Jiahao was unwilling to let go.