From the file's introduction
As the days remaining on the calendar dwindle, it seems as though life does, too. The days grow shorter, the wind grows colder, and all around us the landscape turns stark and barren. Trees take on the appearance of skeletons, and the bright leaves of autumn are buried under freshly fallen snow.
The world becomes even more chilling when its metaphorical death is accompanied by murder most macabre. Bodies have begun to turn up all around the city—bodies that have been mauled by some ferocious beast until they are practically unrecognizable.
The Dead of Winter sends the heroes in pursuit of the monster behind these grisly killings. Can they solve the case before this blood stains the pristine promise of the coming new year?
A Short Urban Arcana Adventure for Four 12th-Level Characters