The player characters must discover how Ulthorn died and the mystery of the Leaning Stone .
One of his apprentices , Ulthorn , was discovered dead in an aperture of the Leaning Stone ( a doorway that reportedly never existed before ) .
The player characters must discover how Ulthorn died and the mystery of the doorway   .
One of his apprentices , Ulthorn , was discovered dead in an aperture of the Leaning Stone ( a doorway that reportedly never existed before ) .