It was directed by Wong Ching-po and stars Andy Lau and Jacky Cheung, in their second collaboration after As Tears Go By, which is regarded as a thematic sequel to the latter.

Yik frequents a brothel whom he has a crush on one of the prostitutes that work there while Turbo starts trouble with other gang members which results in him losing the function of his right hand.

In a final act of friendship, Hung and Lefty proceed to fend off hordes of assassins before eventually collapsing to their wounds and finished off by a group of grunts.

The final scene show Yik explaining how he managed to gain power and respect by completing the assassination of the gang leader and then showing the complete transition of Yik into Hung; suggesting that the cycle will continue with the pair of assassins that had successfully killed Hung and Lefty and is on their way to power and respect.

Metaphorically it refers not to a physical place or geographic location but to the wild and romanticized domain of secret societies, gangs, fighters, entertainers, prostitutes, assassins, thieves, actors, beggars, and wanderers that is roughly the Chinese equivalent to the English terms "bohemian" and "the underworld".