When Lore was thirteen, she escaped a cult in the catacombs beneath the city of Dellaire. And in the ten years since, she’s lived by one rule: don’t let them find you. Easier said than done, when her death magic ties her to the city. Mortem, the magic born from death, is a high-priced and illicit commodity in Dellaire, and Lore’s job running poisons keeps her in food, shelter, and relative security. But when a run goes wrong and Lore’s power is revealed, she’s taken by the Presque Mort, a group of warrior-monks sanctioned to use Mortem working for the Sainted King.

Elspeth Spindle needs more than luck to stay safe in the eerie, mist-locked kingdom of Blunder—she needs a monster. She calls him the Nightmare, an ancient, mercurial spirit trapped in her head. He protects her. He keeps her secrets. But nothing comes for free, especially magic. When Elspeth meets a mysterious highwayman on the forest road, her life takes a drastic turn. Thrust into a world of shadow and deception, she joins a dangerous quest to cure Blunder from the dark magic infecting it.

Annaleigh lives a sheltered life at Highmoor with her sisters and their father and stepmother. Once there were 12, but loneliness fills the grand halls now that four of the girls' lives have been cut short. Disturbed by a series of ghostly visions, Annaleigh becomes increasingly suspicious that her sister's deaths were no accidents. The girls have been sneaking out every night to attend glittering balls, dancing until dawn in silk gowns and shimmering slippers, and Annaleigh isn't sure whether to try to stop them or to join their forbidden trysts.

Hazel Trépas has always known she wasn’t like the rest of her siblings. A thirteenth child, promised away to one of the gods, she spends her childhood waiting for her godfather—Merrick, the Dreaded End—to arrive. When he does, he lays out exactly how he’s planned Hazel’s future. She will become a great healer, known throughout the kingdom for her precision and skill. To aid her endeavors, Merrick blesses Hazel with a gift, the ability to instantly deduce the exact cure needed to treat the sick. But all gifts come with a price.

On the secluded continent of Edenvale, possessing magic is a death sentence. Those who have it are labeled Cursed, and by order of the king, they are Cleansed—a horrific event utilizing a hot, hungry pyre and an iron collar. Enemy to the king, a group known as the Cursed rebels defend their lands from his reach, creating an ongoing bloodthirsty war. When Sage's brother is conscripted for the war, she is forced to trade in her cozy, peaceful cottage life and join the Cursed rebels to get him back.