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.
民国时，桐城富商秦时中错弃福星女儿舟舟，舟舟被督军府收养，为其带来好运。秦时中联合勾结倭人的曹老爷陷害，均失败。舟舟身世揭开后，众人瓦解曹老爷阴谋守护桐城，她也与亲父母相认，一家幸福。
