The end of the 19th century. The streets of Madrid are drenched in the blood of rebels - the uprising against Queen Isabella II is brutally suppressed. Chaos reigns in the city. In 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 some time later she discovers, with astonishment and horror, a door leading to hell. Terrifying scenes from the lives of slaves working on sugar plantations and factories unfold before her. Leonor tries to alleviate the suffering 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 they have both inadvertently become hostages of fate, Mauro and Leonor make desperate attempts to escape from hell, but a monster roams nearby, for whom there are no barriers - pursuing its goals, it commits countless brutal murders, again and again remaining unpunished. In Carmen Mola’s new historical thriller, there is everything that fans of her work expect - betrayal, conspiracies, horrific crimes, and incredible stories of self-sacrifice... The lovers strive to find each other again; witnesses of others’ atrocities attempt to tell what they have seen; unrepentant criminals 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 into a terrifying and mesmerizing pattern.