Rosia Domitius has lived her whole life in Melanthos, in the palace of Emperor Petronius Drusus and his heirs. She loves her homeland, but the magic that once infused it is vanishing, siphoned by Lenore, a small, defiant country to the west. When magical attacks begin along that border, the emperor dispatches an investigative party with Rosia in its midst—as a fledgling assassin. His expectations are clear: she can end her people’s suffering if she kills Lenore’s ruler, a mysterious figure known only as the Eternal Prince.

As soon as her party crosses the border, they encounter a nameless young man with a mischievous smile. Although he acts harmless, the creatures of the woods obey his whims. Rosia’s survival quickly depends on his goodwill, and perhaps on uncovering the secrets he guards with his pleasant façade.

For, according to this stranger, her homeland’s woes come not from Lenore but from within, from rituals lost and bonds betrayed. If she follows her original plan, she might save the dying empire. Or, she might destroy its only hope.