Britain’s most notorious serial killer, Dennis Nilsen, confessed to killing 15 people in 1983. Over a five-year period, he picked up vulnerable young men, lured them back to his home and strangled them, before disposing of their bodies under the floorboards. 　　The truth about how and why he killed has been the subject of much speculation in books and documentaries over the decades since. Now, with unique access to a wealth of personal archive left in his cell after his death, including over 250 hours of never-before-published cassette tapes of his private recordings, this film will take us into Nilsen’s world. From a young boy growing up in a quiet Scottish fishing village to a cold-blooded murderer prowling the streets of London. 　　Set against the backdrop of 1980s Britain, when mass unemployment drew young men to London in search of their fortunes, only to find themselves destitute and easy prey, and weaving together interviews from police, journalists, survivors, bereaved families, and - for the first time - the killer’s own voice, this feature length documentary explores how Nilsen was able to get away with multiple murders and attacks, unchallenged, for five years.

Britain’s most notorious serial killer, Dennis Nilsen, confessed to killing 15 people in 1983. Over a five-year period, he picked up vulnerable young men, lured them back to his home and strangled them, before disposing of their bodies under the floorboards. 　　The truth about how and why he killed has been the subject of much speculation in books and documentaries over the decades since. Now, with unique access to a wealth of personal archive left in his cell after his death, including over 250 hours of never-before-published cassette tapes of his private recordings, this film will take us into Nilsen’s world. From a young boy growing up in a quiet Scottish fishing village to a cold-blooded murderer prowling the streets of London. 　　Set against the backdrop of 1980s Britain, when mass unemployment drew young men to London in search of their fortunes, only to find themselves destitute and easy prey, and weaving together interviews from police, journalists, survivors, bereaved families, and - for the first time - the killer’s own voice, this feature length documentary explores how Nilsen was able to get away with multiple murders and attacks, unchallenged, for five years.

白人历史教师丹·邓恩，在纽约布鲁克林一家破旧的公立中学教书，他的学生多是黑人。丹有激情和创造力，热爱学生，不遵循官方教学大纲，相信黑格尔辩证法，认为历史本质由相反力作用而成。他使得纸页间枯燥的历史生动鲜活，鼓励学生思考和分析历史，及自己周遍世界的运作法则，学生成为丹存活于社会的救生索。晚上，他是不可救药的瘾君子。 这种分裂的生活没有能持续多久，丹某次在空无一人的女更衣室吸毒而虚脱，被他的黑人女学生德丽发现。共同保守的阴暗秘密，拉近了他们的关系，也改变了各自的生活。

白人历史教师丹·邓恩，在纽约布鲁克林一家破旧的公立中学教书，他的学生多是黑人。丹有激情和创造力，热爱学生，不遵循官方教学大纲，相信黑格尔辩证法，认为历史本质由相反力作用而成。他使得纸页间枯燥的历史生动鲜活，鼓励学生思考和分析历史，及自己周遍世界的运作法则，学生成为丹存活于社会的救生索。晚上，他是不可救药的瘾君子。 这种分裂的生活没有能持续多久，丹某次在空无一人的女更衣室吸毒而虚脱，被他的黑人女学生德丽发现。共同保守的阴暗秘密，拉近了他们的关系，也改变了各自的生活。

1986年，韩国京畿道华城郡，热得发昏的夏天，在田野边发现一具女尸，早已发臭。小镇警察朴探员（宋康昊饰）和汉城来的苏探员（金相庆饰）接手案件，唯一可证实的是这具女尸生前被强奸过。线索的严重缺乏让毫无经验的朴探员和搭档曹探员（金罗河饰）只凭粗暴逼供和第六感推断，几次将犯罪 嫌疑人屈打成招。而苏探员客观冷静，据理分析，几次排除嫌疑，警察内部为了证明与推翻矛盾不断，然而无辜女子还是接二连三被残忍杀害，他们只好达成共识一起合作。此时，一个极其符合作案特征的小青年（朴海日饰）成为最大嫌疑人，警方神经绷紧地锁定住他，同时DNA检测报告也被送往美国，然而案件并未在此处停止。

1986年，京畿道某处发现了一名女尸。该名女子死去前曾遭人强奸。两个月后，以相同手法的奸杀案再度出现。不过警方对这类连环凶杀案苦无头绪，导致人心惶惶。警方决定成立调查小组去调查这一系列棘手案件，由小镇警察斗满（宋康昊 饰）和首尔特派警察泰允（金相庆 饰）奉命专责此案。然而这个调查小组的工作不太顺利，擅长于自己的灵感和头脑的斗满跟凡事需要真凭实据的泰允磨擦甚多。斗满发现现场留下颇多死者的头发，来推断行凶者专挑选有脱发毛病的女子为行凶对象。另一方面，泰允亦发现受害人全是在雨天穿著红色的衣服。因此，调查小组决定选定一个下雨的日子，派出卧底去引诱行凶者，但当晚死去的却是另一名女子。斗满和泰允都接近崩溃边缘，但一档录音节目又引出了另一个所有特征都极其符合的嫌疑人，可是最终从美国传真来的鉴定报告令他们难以置信。

George "Babyface" Nelson became one of the most important gangsters of 1930's Chicago by making brutal robberies. In order to compete with Al Capone, he allied himself with John Dillinger

George "Babyface" Nelson became one of the most important gangsters of 1930's Chicago by making brutal robberies. In order to compete with Al Capone, he allied himself with John Dillinger

表面上，尼尔森是一位温文尔雅的公务员，但他的真实面目却是可怕而致命的。但他也是罕见的——一个想要谈论自己罪行的精神病患者。在犯罪学家大卫·威尔逊教授的指导下，他花了几十年的时间采访尼尔森，并与他通信，这部独特的影片包含了新的采访素材和以前未见过的档案，还有对受害者家属的采访。

关于青春。邂逅。分离。回忆。