Cerys is safe in the Kingdom of Aloriya. Here there are no droughts, disease, or famine, and peace is everlasting. It has been this way for hundreds of years, since the first king made a bargain with the lady who ruled the forest that borders the kingdom. But as Aloriya prospered, the woods grew dark, cursed, and forbidden.

A Great Winged One will soon arise and cast his fearsome shadow upon the land. And just as Night slays Day, and Day slays Night, so also shall another Black Witch rise to meet him, her powers vast beyond imagining. So foretells the greatest prophecy of the Gardnerian mages. Carnissa Gardner, the last prophesied Black Witch, drove back the enemy forces and saved her people during the Realm War. Now a new evil is on the horizon, and her granddaughter, Elloren, is believed to be Carnissa's heir—but utterly devoid of power in a society that prizes magical ability above nearly all else.

Orphaned. Trained to fight. Raised to fear the power of Underhill. Secretly in love with a man who doesn’t want me. I’m still just Alli, a.k.a. the half-human orphan fae, but my life is looking up for the first time. It only took me my whole 24 years. But when Underhill - the ancestral home of the fae - shatters, making it impossible for any fae to enter, I’m the only one who knows who did it. A secret that will be the death of me if I do nothing.

Caledon Holt is the kingdom's deadliest weapon. No one alive can best him in speed, strength, or brains, which is why he's the Hearthstone Guild's most dangerous member. Cal is also the Queen's Assassin, bound to her by magic and unable to leave her service until the task she's set for him is fulfilled. Shadow of the Honey Glade has been training all her life to join the Guild, hoping that one day she'll become an assassin as feared and revered as Cal. But Shadow's mother and aunts expect her to serve the crown as a lady of the Renovian Court.

Seventeen-year-old Keralie Corrington may seem harmless, but she’s, in fact, one of Quadara’s most skilled thieves and a liar. Varin, on the other hand, is an honest, upstanding citizen of Quadara’s most enlightened region, Eonia. He runs afoul of Keralie when she steals a package from him, putting his life in danger. When Varin attempts to retrieve the package, he and Keralie both find themselves entangled in a conspiracy that leaves all four of Quadara’s queens dead.