At the end of the 19th century. The streets of Madrid are soaked in the blood of rebels - the revolt against Queen Isabella II is brutally suppressed. Chaos reigns in the city. Saving each other, medical student Mauro and dancer Leonor accidentally commit murder. To avoid prison or death, both will have to leave Spain. Leonor is forced to marry a man she barely knows and flee to Cuba. At first, the island, where nature is magnificent and people are so friendly, seems like paradise on earth to her, but after a while, she discovers with astonishment and horror a door leading to hell. Terrifying scenes unfold before her eyes from the lives of slaves who toil on sugar plantations and in factories. Leonor tries to alleviate the plight of those who have been kidnapped, deprived of their homes, and separated from their loved ones, and one day... she meets Mauro, who followed her to Cuba but was deceived and deprived of his freedom. Realizing that both have unwittingly become hostages of fate, Mauro and Leonor make desperate attempts to escape from hell, but somewhere nearby a monster roams, for whom there are no barriers - pursuing its goals, it commits countless brutal murders, remaining unpunished time and again. In Carmen Mola's new historical thriller, there is everything that fans of her work expect - betrayals, conspiracies, horrific crimes, and incredible stories of self-sacrifice... The lovers strive to find each other again; witnesses of others' atrocities try to tell what they have seen; criminals, knowing no remorse, sow horror. Against the backdrop of Spain's struggle for independence from the Bourbons, and colonial Cuba's fight for independence from Spain, human destinies intertwine in a terrifying and captivating pattern.