该片由香港、日本与韩国三位导演：陈果、三池崇史和朴赞郁的三部短片《饺子》、《盒葬》与《割爱》组成。 《饺子》讲的是年老色衰的李太（杨千嬅饰）为了挽回丈夫（梁家辉饰）的心，向媚姨（白灵饰）买人肉饺子企图重返青春的故事。《盒葬》讲京子（长谷川京子饰）被心魔缠绕，源于她小时因不满姐姐翔子独受爸爸的宠爱，把姐姐锁在盒子里，却意外导致其死亡。某日，京子终于收到邀请函，清算过去的历史。《割爱》讲了导演（李秉宪饰）在恐怖片片场收工后，回到家，却被变态临时演员挟持，以妻子的安全为代价，被要求忏悔。一幕真实的恐怖片在他身上开演。
故事发生在一九八五年的香港，张有铭（李尚文 饰）是正值叛逆时期不知天高地厚的莽撞少年，某日，他跟随一群小混混劫持并且杀害了一对情侣，之后众人遭到警方的逮捕。张有铭因为尚未成年，因此并未得到判刑，而是被关进了监狱，“等候英女皇发落”。 没想到，这一等就是十年，时间就这样悄无声息的来到了一九九七年，香港回归在即，一位名叫誉玲（艾敬 饰）的女子注意到了张有铭的存在。一来二去之间，两人竟然产生了信赖和感情。在梁忠勤议员（邓树荣 饰）的支持和帮助下，誉玲开始着手替张有铭翻案，并且联手很多有着和张有铭一样遭遇的人的亲属，向政府发出联合抗议。
Stine and Teit, your average urban middle-class artists and intellectuals, leave Copenhagen for the wilds of neighbouring Sweden’s forest. Soon, they find out that something is strange there – most disturbingly – when their son Nemo suddenly thinks his mother isn’t really his mother anymore. It becomes clear once Stine and Teit discover that they have neighbours who look exactly like them – mirror images made flesh and blood. The subject of reflections and doubles is introduced in the film’s first shot: a view of a lake landscape turned 90° so that the water’s surface runs vertically through the image’s centre. Only once the shot gets tilted is it revealed which side mirrors which. Later, a mother and child are reflected in a glass door. However, this is not your doppelganger thriller of the gothic variety. Note the title: in physics, superposition means (per Merriam-Webster) "the combination of two distinct physical phenomena of the same type (such as spin or wavelength) so that they coexist as part of the same event". This is more a metaphysical meditation towards the realisation that none of us is ever alone, but also never unique.
影片讲述的是“教授”，一个身患绝症的人，由于命运的捉弄，他目睹了一件与他神秘邻居阿加莎有关的不可思议的事件。为了找到治疗他疾病的方法，他同意跟随她踏上一段陌生而冒险的旅程，进入一个被遗忘但并非完全荒芜的城市荒原。时间的流逝和自然、制度和人的解体都为这个故事奠定了基调，旨在唤起一种不安的情绪，并留下许多未解问题，导致了一个惊天撼地的悬疑结局。。。
