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.
该片根据伊恩·麦克尤恩的同名小说改编,故事讲述原本幸福生活着的儿童文学作家斯蒂芬·刘易斯,因女儿的走失,自己消极度日,变得和妻子渐行渐远。直到第二个孩子的降临才逐渐化解了夫妻隔阂。