Xu Yi entered junior high school and met Wang Ze and became friends. Then Wang Ze introduced senior Qi Wei to Xu Yi, and the friendship between the three people emerged. Xu Yi learned about Wang Ze's past from Qi Wei, which was also a knot in Wang Ze's heart. Xu Yi and Qi Wei tried to find ways to help Wang Ze untie his knot. Xu Yi met Zhang Minghui while running again and introduced him to Wang Ze. Zhang Minghui did Wang Ze a favor and Wang Ze invited them to dinner. Xu Yi, Qi Wei, Zhang Minghui and Wang Ze were running, and then their feelings emerged.