When Maggie wakes up cold, filthy, and naked in a gutter, it doesn't take her long to recognize Kair Toren, a city she knows intimately from the pages of the famously unfinished dark fantasy series she's been obsessively reading and re-reading while waiting years for the final novel. Her only tools for navigating this gritty world of rival warlords, magic, and mayhem? Her encyclopedic knowledge of the plot, the setting, and the characters' ambitions and fates.

Sir Una Everlasting was Dominion’s greatest hero: the orphaned girl who became a knight, who died for queen and country. Her legend lives on in songs and stories, in children’s books and recruiting posters―but her life as it truly happened has been forgotten.

Centuries later, Owen Mallory―failed soldier, struggling scholar―falls in love with the tale of Una Everlasting. Her story takes him to war, to the archives―and then into the past itself. Una and Owen are tangled together in time, bound to retell the same story over and over again, no matter what it costs.

But that story always ends the same way. If they want to rewrite Una’s legend―if they want to tell a different story--they’ll have to rewrite history itself.

In this lyrical, wildly inventive horror novel interwoven with Japanese mythology, two people living centuries apart discover a door between their worlds.

October, 2026: Lee Turner doesn’t remember how or why he killed his college roommate. The details are blurred and bloody. All he knows is he has to flee New York and go to the one place that might offer refuge—his father’s new home in Japan, a house hidden by sword ferns and wild ginger. But something is terribly wrong with the house: no animals will come near it, the bedroom window isn't always a window, and a woman with a sword appears in the yard when night falls.

October, 1877: Sen is a young samurai in exile, hiding from the imperial soldiers in a house behind the sword ferns. A monster came home from war wearing her father’s face, but Sen would do anything to please him, even turn her sword on her own mother. She knows the soldiers will soon slaughter her whole family when she sees a terrible omen: a young foreign man who appears outside her window.

One of these people is a ghost, and one of these stories is a lie.

Something is hiding beneath the house of sword ferns, and Lee and Sen will soon wish they never unburied it.