人说，四十不惑。但四十二岁的边亮（黄渤 饰）却猛然间发现自己的困惑越来越多，令他手足无措。这一年，生活中的危机接踵而至。作为积极要求进步突破的父亲，遭遇了性格恬静淡泊的儿子（荣梓杉 饰）的抵抗；事业深陷瓶颈又让他的前进计划严重受阻。紧接着，一直以为平顺美满的家庭，居然也在这不惑之年出现了骤变的端倪。边亮突然发现自己人生四十多年来积攒的智慧和经验已不够应付种种问题，甚至他曾经应对生活的方式也似乎全部都错了。边亮感到惆怅迷惑且无力，但作为一个有责任心的中年人，他无法停下，只能一边艰难前行，一边努力寻找着解决问题的办法。最终，当过去的生活被打碎重组后，边亮与妻子（梅婷 饰）、儿子和亲友们和解，也找到了打开生活的正确方式。

People say, 40 not 40. But at forty-two, Bian Liang (Huang Bo) suddenly finds himself more and more confused, leaving him at a loss. This year, one crisis after another in life. As a positive demand for progress breakthrough father, met the quiet character of the son (Rong Zishan) resistance; career bottlenecks and let his progress plan seriously hindered. Then, has been thought that smooth and happy family, unexpectedly also in this 40-year-old sudden changes in the beginning. Bian Liang suddenly found that the wisdom and experience he had accumulated over the past 40 years of his life was not enough to deal with all kinds of problems. Even the way he had dealt with life seemed to be all wrong. Side light feel melancholy confused and powerless, but as a responsible middle-aged man, he can not stop, can only hard on the one hand, while trying to find a solution to the problem. Eventually, when his old life is shattered and remade, he reconciles with his wife (Mei Ting) , son and friends and finds the right way to open up his life.