Photographer Kay Farrow sees the world in black and white - literally: she has a rare eye condition that makes her unable to discern colours.

The brutal murder of street hustler Tim, the beautiful boy who is the subject of Kay's latest book of photographs, sends her on a dark voyage into San Francisco's erotic underbelly - she's sure this is not just a routine street killing.

Moving with her camera among the sexual outlaws, both male and female, who populate San Francisco's gay bars and SM clubs, Kay pieces together Tim's bizarre life and mysterious death - and confronts her own demons in a shattering climax ...