Asteria is dying. Its kingdoms are fractured, its people warring, its magic faltering—and anyone who could save it has vanished.

On Earth, Conor will do whatever it takes to keep her head down and her sister alive. She’s a shadow in her own life—until the night her classmate Jaime drags her into the woods and through a rift between worlds.

Trapped in the mysterious realm of Asteria, Conor has no choice but to flee with him through dark forests and even darker tunnels. As they race to evade prowling fexes and sentinels, she searches for something—anything—that could get her home.

She’s not the only one desperate to escape. In the sea’s shadowy depths, a thief and an assassin hunt for answers that might save their doomed city. Atop floating towers, a reluctant queen uncovers ancient secrets. As storms rise and dragons stir, she longs only to disappear. Across the wintry meadows below, an exiled heir fights to outwit an unsettling captor—all while plotting to reclaim her stolen throne.

Their paths are converging.

Something in Asteria is waking.

And nothing will ever be the same.