Effy Sayre has always believed in fairy tales. Haunted by visions of the Fairy King since childhood, she’s had no choice. Her tattered copy of Angharad—Emrys Myrddin’s epic about a mortal girl who falls in love with the Fairy King, then destroys him—is the only thing keeping her afloat. So when Myrddin’s family announces a contest to redesign the late author’s estate, Effy feels certain it’s her destiny. But musty, decrepit Hiraeth Manor is an impossible task, and its residents are far from welcoming.

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.

Cecilia Bassingwaite is the ideal Victorian lady. She's also a thief. Like the other members of the Wisteria Society crime sorority, she flies around England drinking tea, blackmailing friends, and acquiring treasure by interesting means. Sure, she has a dark and traumatic past and an overbearing aunt, but all things considered, it's a pleasant existence. Until the men show up.

Seventeen-year-old Aderyn ("Ryn") only cares about two things: her family and her family's graveyard. And right now, both are in dire straits. Since the death of their parents, Ryn and her siblings have been scraping together a meager existence as gravediggers in the remote village of Colbren, which sits at the foot of a harsh and deadly mountain range that was once home to the fae. The problem with being a gravedigger in Colbren, though, is that the dead don't always stay dead.

Winter lasts most of the year at the edge of the Russian wilderness, and in the long nights, Vasilisa and her siblings love to gather by the fire to listen to their nurse’s fairy tales. Above all, Vasya loves the story of Frost, the blue-eyed winter demon. Wise Russians fear him, for he claims unwary souls, and they honor the spirits that protect their homes from evil. Then Vasya’s widowed father brings home a new wife from Moscow. Fiercely devout, Vasya’s stepmother forbids her family from honoring their household spirits, but Vasya fears what this may bring.