明朝年间，有一无赖魏进忠（林剑峰饰）仰羡先朝大太监刘瑾（麦家琪饰）之荣华富贵，特意结识孙太监望能引领入宫。一日，魏与孙观赏奇技淫巧之杂耍表演时，孙看中艺妓向泰其（小宫友里 饰），并跟班主买下泰其，为施以极乐虐杀自娱。泰其得悉后哀求魏同赴私奔，出走当晚，泰其向魏施展极乐酷刑秘技，魏获真传后，杀掉泰其并割其首级及自宫阳物呈于孙太监以作赎。

Young Ngai planned to castrate himself to enter the palace for richness and fame. On his way, Ngai was attracted by Han, a showgirl from a sex torture show. They then ran away from Sun the eunuch, Ngai’s introducer, who meant to buy Han for sexual torture until death. Same night, Han showed Ngai the greatest sex torturing skills; but in return, after learning so, Ngai killed her in the middle of the torturing and handed her head to Sun for forgiveness…