新宿歌(gē )(🍅)舞伎(jì )(👷)町的民宿大厦(🥇)——“流(liú )氓(máng )公寓”的山口组蜗居点。黑社会组(🔧)织安生组的老大安(ān )生(🔬)芳(fāng )雄(xióng )与情妇及一(yī )亿日圆现(xiàn )金失(shī )踪后(🌗),流氓公寓每天(tiān )(⚫)都有黑道(dào )人被(🤷)杀(🗄)。外界断定这是传说(shuō )中的杀手“Ichi”所为。武(wǔ )(😚)斗(dòu )派头(tóu )目垣原(浅(qiǎn )野忠信饰)于是(🔊)开始(⏺)疯狂寻(📎)找凶手。垣原(yuán )是个极度(😞)被虐狂,视(🦗)虐(🌑)待成(🌊)狂的老大如自(zì )己的神明(míng )一般,迷恋与(yǔ )崇拜(👓)他(🙀)。垣原误(wù )信(⏰)退(tuì )(🈴)役江湖(🥫)老鬼阿(🧤)叔,掳劫(🕙)了敌对帮派头目,酷(🥕)刑(xíng )逼供,引起(🤖)江湖风(fēng )暴,令安生(❕)组(💝)进(💹)退失(🏉)据。老大情(qíng )妇Karen((🏻)孙佳君饰(🐨))与(yǔ )阿叔相熟(shú ),为(wéi )讨好垣原(yuán )以身(shēn )犯险(xiǎn )。Karen在阿叔帮助下,渐渐(📸)接近神秘杀手阿一……