年轻的克劳蒂雅是个艺术品修复师，公司入不敷出，公家机关又欠她酬劳，全靠外婆的退休金撑着。然而外婆突然过世，公司眼看就要破产，走投无路的克劳蒂雅于是和员工合谋，把外婆「冻」起来，好继续领退休金，撑到公家机关付款。好不容易就要度过难关，正直却笨拙的税务警察赛门居然无可救药地爱上了克劳蒂雅！层层蒙骗、重重伪装、误会连连，克劳蒂雅的骗局就像把冷冻外婆摊在阳光下，一点一滴在融化…
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.
