It begins on Coruscant where the Jedi begin their secret invasion of the planet in order to free it from the covert control of the Lost Tribe of the Sith.
Troy Denning
Star Wars Fate of The Jedi: Abyss
Star Wars Fate of the Jedi: Abyss The novel starts off in the basement levels of the Jedi Temple on Coruscant where captured Jedi Knights Seff Hellin and Natua Wan are held captive for the Force psychosis that they are suffering.
Reggie's Take.com 