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退休军官老丁（洪金宝 饰）因“健忘症”弄丢孙女，内疚回到老家。邻居小女孩春花（陈沛妍 饰）成为他的慰藉。可女孩的父亲（刘德华 饰）无意卷入了当地黑帮团伙的争斗中。老丁为营救春花挺身而出，也寻回那份作为军人的骄傲和弥补作为爷爷的过错。

At the age of eight, the now 25-year-old director caused an incident, which has remained traumatic as he became older. Although it seemed just a trivial matter, something one might expect from children, he obstinately questions his family, friends and teachers about what happened at that time. Worrying over the thoughts of dishonor he saw in his family’s eyes then, he has fostered a self-hatred over the years. As if reconstructing the past with his camera, he attempts to free himself of this self-hatred, shedding tears for himself at times and opening his own wounds, then healing them. What he has discovered through filmmaking was his once sealed “self.” The question now is, where to go from here?

1968 年民主党全国代表大会上的和平抗议演变成了与警察和国民警卫队的暴力冲突。抗议活动的组织者包括艾比·霍夫曼、杰里·鲁宾、汤姆·海登和鲍勃·席勒，他们被指控阴谋煽动暴乱，随之而来的审判是历史上最臭名昭著的几场审判之一。

大野康臣（成田凌 饰）在一家补习班教课，拥有英俊外表和高超智商的他虽然非常容易获得旁人的好感，但因为其一根筋的头脑和几乎为零的情商，大野的恋爱经历也是零。每一次和女孩子约会都会以失败告终，即便是这样，大野也依然对于恋爱和婚姻怀揣着憧憬，并且不知道自己的问题究竟出在哪里，直到有一天，一个名叫秋本香住（清原果耶 饰）的学生指出了大野的症结所在——他根本就不会谈恋爱。那么，要怎样才能够变得擅长恋爱呢？大野向唯一可以依赖的秋本发出了求救信号，虽然秋本对于恋爱的理论知识非常的充沛，但实际上她的恋爱经历也是零，于是，两个恋爱菜鸟开始了对于爱的求证。