From the Back of the Book:
In the dead of the night, a ghastly fog shrouds the deserted streets. Doors are locked, windows shuttered, as a deathly silence haunts the shadows. Almost all of Lankhmar's citizens cower in their homes. Tonight the streets and alleys of Lankhmar belong to the ancient gods--this is the Night of Fear.
Whose life will be lost this night--a lonely wench abandoned in the street? Perhaps a young noblewoman betrayed by her family? You can find out, as you venture into the dark and winding streets of Lankhmar. But beware, eyes are already watching you.