Obey the curfew. Never fly past Elysia's boundaries. Above all—never speak to humans. For twenty-one summers, Sylvia has evaded the ironclad rules set by her village, driven by an insatiable curiosity to know the world beyond the confines of the willow her fellow fairies call home. Her exploration is shattered by a bullet through her wing—courtesy of Jon and Cliff, seasoned monster hunters who suspect her involvement in gruesome disappearances. A harrowing captivity transforms into an unlikely alliance when Sylvia saves Jon's life by sealing a magical pact with the enigmatic Ancients. Sylvia is left with no choice but to stay by Jon's side while he and Cliff hunt for a ruthless werewolf, determined to free herself from the Ancients' settlement. She realizes she and Jon may have more in common than she ever could have imagined—and icy hostility melts into forbidden attraction. With the full moon's ominous countdown away, Sylvia and the hunters race against time with the fate of countless lives—including Sylvia's—hanging in the balance. After all, killing a monster is easy compared to falling in love with someone you shouldn't. Contains mature themes.