本片故事背景设置在19世纪五十年代的英国，Alice Lawson是一档美食节目的主播，也是一位严格自律的妻子。这天晚上，Alice同往常一样结束工作，买好蔬菜准备回家替家人做晚餐，可是不巧遇到了大雨，内心本就不安宁的她陷入了歇斯底里的惶恐中。她临时改变计划，独自一人在酒店过夜，而此时的她并不知道这一决定将彻底改变她的生活。
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.
