黑社会大佬（吕良伟饰）跑路之前将自己刚出世的婴孩托付给契夫唐秋水（吴孟达饰），起名为唐十二（刘德华饰），从此人们都称他做十二少，因为他有十二个黑白两道的契父契妈，表面上他上天之骄子，但内心比谁都寂寞。养大他的契父唐秋水是庙街的百搭替工，还有一个可能是亲母的龟婆叫凤凰女（叶德娴饰），她是全庙街最麻烦的女人，当年同月同日舍弃了自己的儿子在庙街。他有一个世仇叫立令，是官涌的霸王，他比魔鬼还可怕。一天，十二少遇见一个来庙街传道的女子叫德兰（王祖贤饰），由第一眼开始，他便爱上她……
为了魔法球，黑暗城堡袭击了北方小镇。魔法鼠亨利逃亡，被精灵峡谷的安妮所救。在安妮、基普等人的帮助和自身的努力下，亨利的魔法成绩不断地进步，并在魔法大赛中拔得头筹，获得了大家的尊重。
The crooks in London know how it works. No one carries guns and no one resists the police. Then a new gang appears that go one better. They dress as police and steal from the crooks. This upset's the natural order of the police/criminal relationship and the police and the crooks join forces to catch the IPOs (Impersonating Police Officers), including an armored car robbery in which the police must help the gangs to set a trap.
KrishnaDevakaKD,alaidbackcop,worksinAPHIT,hastotakeupagruesomemurdercase.AsKDunravelsthelayersofthecrime,thestakesriseunbelievablyhighandthethreatcomesunusuallyclose.
