https://www.fantasyflightgames.com/en/news/2016/12/8/carnevale-of-horrors/
That was unexpectedly fast! This is exciting!
Anyway, it seems to be a mask-themed adventure (taking place, naturally, at the Venetian Carnevale) where you're trying to protect bystanders from the evil cultists who are twisting the celebration to their own dark ends. You travel the map in a clockwise direction, spending clues to unmask revelers who can turn out to be innocent allies or enemies.
The listed rewards include an Ally asset as well as four mask assets (the two spoiled masks give you an immediate benefit upon entering play and can be discarded later to replace any skill with Strength or Agility, respectively; presumably, the others are for Intellect and Will).