The world is not what it was. Light is but a tiny flickering flame in a blanket of darkness, struggling not to be snuffed out. Lucia, an orphan girl, is also a Core, a physical manifestation of Elohim's pure love and part of an ancient prophecy that will prevent one of the Four Horsemen of the Apocalypse from being controlled by the darkness to destroy everything good. But Lucia's not so sure she believes that anymore. Her upbringing by the Amilign monks has given her more questions than answers.

When the extent of the Amilign's evil plans for her future is revealed, Lucia flees their mountain ashram, only to run into the mysterious Nicanor, who offers to take her to the prophets who possess the answers she seeks. Instinctively drawn to Nicanor and his white horse, Adira, the same horse who's been haunting her dreams for years, Lucia wars with her growing feelings for her guide. But her years at the ashram have taught her not to trust anyone, and Nicanor hoards secrets like dragons their treasure.

When the truth about the nature of Lucia's bond with the horseman comes to light and Lucia is unexpectedly recaptured by the enemy, Nicanor faces a hard decision. Will he continue to let fear rule his future-and Lucia's-or will he unlock the heavenly power Elohim gifted before it's too late for everyone?