“迷魂党”劫案弄得满城风雨，前惩教署职员柳记雄嗜赌如命，从囚犯群中听取迷魂术后，成功进行一连串的迷魂劫案，沾沾自喜。吕SIR奉命缉凶，亲身试验，饮遍港九便利店纸包饮品，务求深入虎穴，缉拿凶犯。

Correction Officer Kwok Kam Hung is a gambling addict and owes a large sum of money, so he constantly makes money through the inmates. The department finds out and fires him. Unemployed, Hung seeks other means to survive and recalls a trick formula that will daze the victim and take the victim's money. He first tries and succeeds in dazing a prostitute and taking her money. Hung then decides to inject the daze drug into drinks in convenient stores.