From publisher blurb:
Partners is a unique story-telling game where the plot is procedurally generated. Using random words and a regular playing card deck, two players will build their very own detective show, four suspects and a solution to the mystery even they won't see coming.
Although designed specifically for two players, the game can be played with one or many. You just need a deck of cards and a desire to butt heads and solve crimes.
This expansion adds new mechanics to focus on the ultimate Wild Card: the redoubtable Sherlock Holmes, Consulting Detective. The game is afoot, and Moriarty's hand is everywhere and only you and your doughty partner can uncover the intricate link between a single scuff on a pant leg and a threat to the Crown Heads of Europe...