当小贩的武（卢惠光饰）突然人间蒸发，后报梦给妹妹娴往找其友民（李灿森饰），娴找到民后觉得事有蹊跷，於是报警求助。重案组李sir（李修贤饰）查出武被民及其同党四人骗取了数十万元，原来民恐怕被武识穿而决定先发制人，诱骗武到他家中并把他杀掉，民和友人利用速递车弃尸而逃。最后李sir成功把四人绳之於法。

Inspector Lee (Danny Lee) and his team (including Monica Chan and Cheung Kwok-Keung) look into the mysterious disappearance of a seedy loan shark (Ken Lo), but find no real leads. Amazingly, the culprits fall into their laps. Four young men, led by Wong Wing-Man (Sam Lee) confess to the killing. Apparently, they were deep in debt, and found the murder of their friend to be the only way out. There is one problem, though: no physical evidence.