The thirty year old Liao Tian (Tong Wei decoration) having a midlife crisis, failed marriage, cause nothing, reduced to KTV toilet brush. An accidental opportunity, he met has become a "big brother" figure of the old classmates Liang Dong (Wang Liang decoration), were forced to attend high school reunion. Here, Liao Tian met old friends, and those that love the campus Belle -- Xue Man (Huang Rong decoration), remind him of his hidden in the bottom of the memory, and that most beautiful and full of regret youth. And all the people change also let Liao Tian feel the youth is gone, not again sad. Liao Tianyong their way to the green...