Brimstone is the designer drug du jour. After the first few hits, you'll see every supernatural beast imaginable. After that, you'll start seeing the really scary stuff. Agent Makenna Fraser would like to unsee the collateral damage caused by Brimstone: dead drug dealers missing their hearts and their souls amongst other things. And since the drug can only be produced with magic and molten brimstone fresh from Hell, that means a rift to the underworld is open somewhere in the city. And when the cartel loses control of it, it's going to be Hell on earth.