As the vice president of a listed company, Martin (played by Huo Jianhua) suddenly suffered from a brain tumor. He was alone and prepared to face death calmly, but there was a faint bond in his heart - he and three friends who were as close as brothers were in an alley in Beijing.Grow up together.On the eve of high school graduation, an accident separated him and his three brothers... Martin wanted to resolve his old grudges and regain friendship before his death, so he immediately returned to China and restarted the life copy of the four brothers in Baofang Hutong.It is not difficult to find many realistic projections in the “Light Year” men's gang: rich but without health, Martin's life is facing the end; his son is about to take the college entrance examination but does not want to go to college, and education problems give Wang Chunsheng (played by Tian Yu) a headache; Internet high school studentsAlthough he could not escape being laid off, Li Lianbao (played by Qiao Zhenyu) encountered a career crisis; Tong Qiu (played by Liu Duanduan) was an ordinary person who faced the pressure of his parents to give birth and the cold relationship between husband and wife... All kinds of experiences can easily resonate with the audience, and the character experience is setIt is real and vivid, just like the epitome of middle-aged people who really exist around the audience.