铁蛋的媳妇二妞被发廊土豪一线天抢走！为夺回老婆，铁蛋踏上寻妻之路，远征上海滩。铁蛋必须大战浦口码头斧头帮，对决静安寺按摩院香艳春丽，斗舞人民广场灭绝师太，登陆硝烟弥漫的八仙桥菜市沙场，拜访精武门陈真以茶代酒唠家常，最后杀入和平饭店大乱战。功夫杀敌不困难，但铁蛋应该如何赢回二妞飘走的心？
故事讲述了虐恋小说作者纪述（朱正廷 饰）和钟爱圆满爱情的影视策划宋言柒（卢昱晓 饰），两人意外穿越进纪述的小说里，进行剧情改写相互博弈的故事，在改写小说的过程中，两人也不断成长，同时也为小说注入了温暖血液。
本片改编自中岛京子同名小说，讲述原是中学校长的父亲(山崎努饰)被确诊为认知障碍后，他是如何和妻子曜子(松原智恵子饰)及两个爱女(竹内结子、苍井优饰)度过接下来的时光的。
An unprecedented pandemic has ravaged the planet, leaving resources insufficient to maintain the human population. To combat the crisis, a totalitarian governing body known as The Bureau established "The Deal.” Accept The Deal, and you'll receive a job, housing, and medical care that will keep you safe and healthy for twenty more years, at which point you must take your own lif...