Hart is a marshal, tasked with patrolling the strange and magical wilds of Tanria. It’s an unforgiving job, and Hart’s got nothing but time to ponder his loneliness. Mercy never has a moment to herself. She’s been single-handedly keeping Birdsall & Son Undertakers afloat in defiance of sullen jerks like Hart, who seems to have a gift for showing up right when her patience is thinnest. After yet another exasperating run-in with Mercy, Hart finds himself penning a letter addressed simply to “A Friend”.

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.

In Manhattan, a young grad student gets off the train and realizes he doesn't remember who he is, where he's from, or even his own name. But he can sense the beating heart of the city, see its history, and feel its power. In the Bronx, a Lenape gallery director discovers strange graffiti scattered throughout the city, so beautiful and powerful it's as if the paint is literally calling to her. In Brooklyn, a politician and mother finds she can hear the songs of her city, pulsing to the beat of her Louboutin heels.

Exiled by her despotic brother, princess Malini spends her days dreaming of vengeance while imprisoned in the Hirana: an ancient cliffside temple that was once the revered source of the magical deathless waters but is now little more than a decaying ruin. The secrets of the Hirana call to Priya. But in order to keep the truth of her past safely hidden, she works as a servant in the loathed regent’s household, biting her tongue and cleaning Malini’s chambers.

This is the way the world ends...for the last time. It starts with the great red rift across the heart of the world's sole continent, spewing ash that blots out the sun. It starts with death, with a murdered son and a missing daughter. It starts with betrayal, and long dormant wounds rising up to fester. This is the Stillness, a land long familiar with catastrophe, where the power of the earth is wielded as a weapon. And where there is no mercy.