《不可遗忘》第二季仍围绕一个旧案开始。这一次，枭情伦敦的利河里打捞起一个旅行箱，枭情里面蜷成一团的尸骨已有近三十年。从遗留的手表和Call机开始追查，几个拥有各自成功人生的角色浮出水面。洛林·艾什本饰演的尼克森探长是死者当时的妻子，有丈夫和子女；马克·伯纳饰演的科林·奥斯本是前银行家、现刑事律师，有一位同性爱人，正准备领养一个女童；萝西·凯弗利洛饰演的玛丽安·切尔西是儿科肿瘤病房的护士，有丈夫无子女，与母亲和姐姐关系紧张；巴德莉亚·提米米饰演的莎拉·默罕穆德是一个正在竞聘校长的英语教师，与丈夫育有三子。当年的事后，他们的人生均发生了重大转折。
王菲
回复 :一名年轻的罪犯加入了一个消防项目，寻求救赎和缩短刑期，他和其他囚犯与精英消防员一起扑灭整个地区的大规模火灾。
西单女孩
回复 :To the streets, “Raq” Thomas is cold, hard and fierce — a successful and deadly woman taking names in a man’s world. She is tough, resolute, ruthless, but Raq still is capable of love. Great love. The sole recipient of that affection is her son, Kanan; he is everything to her. As much as she cares for him, though, there are many instances where one wonders if she loves him for who he is or if she loves him merely as an extension of herself. The middle child of three, Raq also carries the heavy burden as the earner for her two brothers. She is the sun, and everyone else in her universe exists in her orbit.
庹宗华
回复 :20世纪30年代的中原。讲礼村出了个好讲理的杨百顺，此人名为百顺却百事不顺。磨豆腐、杀猪、染布、挑水，杨百顺行行走不通，处处碰壁，然而只有剃头的外国牧师老詹和寡妇吴香香能懂他。延津大办社火，百顺表现出众一举成名，赢得延津新学校 长的女儿秦曼卿的芳心。身份的悬殊使有情人难成 眷属，秦曼卿被迫嫁给阴狠的新任警察局长高得令，杨百顺则入赘寡妇吴香香家。香香的地下情人罗五在狱中得知此婚事，杀警越狱嫁祸杨百顺，从此百顺、罗五两人各自亡命天涯。延津县长韩敬明，上要阿谀省府耿专员，下要防范副县长丁梓护联合地方黑势力篡权夺位，房中还要私藏巨款，每日如履薄冰。看尽事态万千，尝遍人生苍凉，杨百顺带着巧玲和灯盏踏上寻找孩子母亲的征程。本片根据刘震云的《一句顶一万句》改编而成。
