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.
在明尼苏达州北部的“边界水域”中，六个老朋友之间的周末露营之旅在神秘的环境下死亡后变得悲惨起来，随着他们企图在本集团内揭露杀手，引发进一步的动荡。
