World of Darkness: Slender Man episode 4

The investigators have uncovered a conspiracy of four families that has brought great evil upon the city. Each family held a part of an artifact of great power but when they misused it, everyone suffered a terrible fate. In order to stop the Slender Man, the investigators must find the four pieces. One piece is in the Tanner neighborhood, and a strange little girl is more than they realized. What secrets does she hold and is an enemy or ally?