47 - Ashes at Dawn

alleys of Ustalav’s crowded capital city. But from the shadows, a dark patron rises with offers of aid and insights into the cult’s ultimate evil. All he asks in return is that the adventurers put an end to the murderer terrorizing the city’s vampires. This leads the heroes into an underworld of endless night, where they must explore the vampires’ deadly society and indulge its blasphemous traditions if they’re to discover who’s murdering the undead.
Source : Paizo