The final showdown is here. With Melba and Lee's power unraveling, the students of St. Regis face a new, and more dangerous, threat: the unhinged psychopath who has haunted them from the start. Nicholas Harris—the illegitimate son of Julia Abbott and a corrupted tool of the Kernaghans—is now loose and untethered, his mind shattered and his thirst for violence insatiable.

The students must ally with an unlikely source—Julia Abbott herself—who finally reveals the truth about her son and the sinister plot that has kept her in silence for years. As the students learn the full scope of the conspiracy, they realize that defeating Nick isn't about power, but about understanding. They must find a way to sever the ritual's hold on him, to save the very monster who has been their tormentor. With their combined gifts at their peak, Keara and her friends must confront the darkest part of the St. Regis legacy and decide what kind of future they want to build.