讲仁义、论道义、守规矩，这是做人的道德准则。沦落在城市各处的无业游民，也有着他们的江湖规矩。但是，并非人人都守规矩……三个人搭伙儿绑架了一名女大学生，事后发现绑错了对象，在如何处理人质的问题上，三人各怀鬼胎，伎俩使尽，最后三败俱伤一场空。

It is people's moral code of being kind, moral and obeying rules. Even the vagrants who are scattered in the city have there own rules which is not obeyed by everyone however. Three man kidnapped a college girl together but found that she was the wrong target afterwards. They used all their tricks with their own purpose in dealing with the hostage but ended up with nothing to all of them.