The sixth seal is broken, and the anti-Christ has risen. As the world falls into complete chaos, the Four Horsewomen find an unexpected ally: The Morrigan. She's their last chance to learn to control their powers as Riders before the final battle for humanity.
Time is running out to save the world. But first, the Riders must save themselves. Felicity's psyche is broken after Sekhmet's possession and she refuses help from anyone, especially Dynah, causing a rift between them. Willow slides further towards the brink of darkness as she struggles to save humanity instead of end it. And Penelope traverses the perilous realm of dreams each night in search of the dream bridge that can free Atsa from his prison.
The end of all things draws ever closer, and just when they think things can't get worse, an explosive discovery changes everything. No matter what the Riders are willing to sacrifice to save the world, its destruction may be inevitable.
