"The third film in the series, The Trap, is an unusual beast. When the film opens our perpetually down-on-his-luck hero is actually on a bit of a roll. Business is booming, he’s got a new girlfriend, Akane has been accepted into college … he’s even upgrading his office equipment. Things couldn’t be better, right? …

末子是私家侦探,有一次在饭店里救了中国人杨海平,但自己的手指却被砍断了,杨海平为了报答末子,就给了他一笔钱,但末子拒不接受,于是杨海平就叫他收下这笔钱帮他找哥哥杨德健,杨德健,杨德健两年前来了日本,后来就失踪了…但经过调查,末子发现杨海平兄弟原来都是台湾黑社会“龙帮”的杀手,但是杨德健在两年前执行任务后就叛帮加入了日本黑社会“黑…

该剧改编自江户川乱步同名作品，讲述了女盗黑蜥蜴与警视副总监明智小五郎斗智斗勇的故事。