London, England
Sarah Alopay has found Earth Key and she is winning. But she cannot forgive herself for what she's done. The only thing that keeps the demons at bay is Playing. Playing to win.
 
Queens, New York
Aisling Kopp believes that Endgame can be stopped. But before she can get home to regroup, she is approached by the CIA. They know about Endgame. And they have their own ideas about how it should be Played.
 
Kingdom of Aksum, Ethiopia
Hilal ibn Isa al-Salt narrowly survived an attack that leaves him horribly disfigured. But he lives, and he knows something the other Players do not... A secret that can help redeem humanity - and maybe even be used to help defeat the beings behind Endgame.
 
Now Sky Key - wherever it is, whatever it is - must be found. And all nine Players will stop at nothing to get it. Endgame is here.