A Fei and Yin Feng have been hanging out together since childhood. For that illusory ideal, A Fei flew out early, but Yin Feng was still imprisoned on the university campus. Ideals, love, marriage, career, and reality force them to go on step by step, so that the brothers turn against each other. No one is lucky and no one is unfortunate. There is nothing to forgive, nothing to regret, everything is like smoke, I have laughed, cried, hated, it is short-lived, and now it is God, no matter how long or short it is! Eternal, only friendship remains.