Branwen has one rule: don't draw attention, don't get attached. Four centuries as the hidden, hunted daughter of the Seelie Queen and Goblyn King taught her what happens to anyone she loves. Pretending to be human in San Francisco, Branwen is supposed to pass chemistry, ignore the sentient fire in her chest, and let the Wayfairer keep BlackFyre leashed. One crack in its control, and the thing inside her won't stop at monsters-it will burn everything. Then assassins crash through Daphne's window. Saving them means breaking every rule-unleashing BlackFyre, obliterating their attackers, and shattering the Wayfairer into nine shards scattered across the globe and Goblyn realms. Now the Goblyn Princess-Branwen's half sister-has sent her Handmaidens to claim shards to use against her. To keep the people she loves alive, Branwen must decide what to burn: her enemies, her secrets, or the girl she broke her rules for. Hidden heir. Sentient fire. Shattered talisman. When assassins hit her only friend, Branwen must decide what to burn-and who she'll burn for.