Bound by the witch Nightsinger, Zera is a Heartless - immortal servants with hearts kept in jars. To gain her freedom, Zera must infiltrate the noble court and steal the heart of Crown Prince Lucien d'Malvane. Disguised as Lady Zera, she enters a world of political intrigue and danger. Lucien, who detests court life as much as he is adored within it, becomes Zera's target. Yet, the two find themselves drawn into a perilous dance of wits and wills. With her existence hanging by a thread and a prince's heart the price of her freedom, Zera must navigate a treacherous path without losing herself or her heart - both figuratively and literally.