From the back of the book:
Trade the guilds for gangs and the staffs for Glocks.
Trade the folklore for funk and the history for hip-hop.
Trade tomes for CDs, bards for DRs, trade minstrels for MCs.
Trade what you think for the harsh reality.
This is a world where slingers peel each others caps for the secrets of the streets. This is a time just before it all went commercial and everybody and their mama had a record deal.
This is a world just one beat from our own where magic has hit the mainstream and slingers-turned-rappers are getting gold records while sowing discord among the elders.
This is a world where saying too much can cost you your life. Take it from me, kid, life on the street ain't no plaything and you have to work for your payday.
On the street the most important this you have is your Wyrd.