Playboy Jack Lam (Wong Cho Lam) may be short and shallow, but he's got money and lots of it, which is enough to keep the girls coming. He even manages to dodge the financial tsunami thanks to a fortuitous error. Jack's hot gold-digger girlfriend (Chrissie Chau), however, thinks he's gone bankrupt and dumps him immediately, sending him a nasty wake-up call. Encouraged by the advice (and cute looks) of Angel (Angelababy), Jack decides to go out and look for love again, encountering an emotionally unstable dancer (Race Wong), a naive massage girl (JJ Jia), and a scarred triad girl (Kate Tsui).

Eastern Kowloon is a festering hotbed of crime and vice watched over by a coalition of five triad bosses who nominally get along. When boss Jimmy (Calvin Poon) gets gunned down in the streets, however, the wheels of war begin to spin. Away in Taiwan, Jimmy's wife Cheung Wah (Ada Choi) passes temporary leadership to their trusted bodyguard Po (Shawn Yue) over disgruntled #2 man Blackie (Chapman To). Po has to find the gunman and keep things under control until Cheung Wah returns to Hong Kong the next day. But in the meantime, Blackie, the other four leaders, and the police are all making moves of their own.