[2] Based on a true story the film is set in the world of Hong Kong's pornography and prostitution business.

They ultimately stumble on the idea of a pornographic brothel guide; rather than unobtainable porn models their magazine features actual prostitutes working in the territory, together with an assessment of the girl and where she can be found.

The visibility and money from this success leads to run ins with the law and organised crime, but what drives a wedge between Andy and John is their attitude to sexual temptation.

Ultimately John manages to extract himself from the world of porn and prostitution, whilst Andy finds it impossible to leave.

The version released in mainland China changes the focus of the film to law enforcement efforts to end the pornography industry.