Isabelle, a human maiden, is forced to take her sister’s place and wed Lord Rohan, the mad vampire lord, within the perilous Nightbrook Castle. Trapped in a dangerous den, she lives in constant fear while testing her mysterious husband. Gradually, she uncovers his dark secret: he lost his heart and suffers from a corrupting curse beyond his control. Letting go of her prejudice, Isabelle chooses to save him. Meanwhile, she exposes the cruel blood slave trade, Cordelia’s scheme to impersonate her, and the sinister threats lurking from the Realm of Death. Filled with tangled romance, faction conflicts and stories of redemption, the series brims with twists, paving the way for a brand-new dark chapter.