Serafina has triumphed, the first Guardian in hundreds of years. Together with her friends they have overthrown the Arch Demon and taken back control of the demon hierarchy. Next, they have the rest of the world to contend with, as all eyes turn to her.
Justin has risen to become the Master of the US, and is determined to change demon society in order for his species to survive. As he struggles to fight and retain his titles against other warring Masters, a familiar darkness creeps into his soul.
Azazel is still alive, with revenge on his mind. The former Arch Demon is furious at being betrayed, and vows to destroy everyone who defied him. His ultimate goal: plunge the demon hierarchy into war and destroy the planet and all of humanity in the process.