After the heinous murder of his grandfather, Don Patricio, Don Juan Cortez decides it's time to have a family. As a well-known Cuban treasure seeker perpetually traveling to unexplored places, he doesn't want to waste too much energy on the fairer sex. His exclusive aims are to have an heir with a noblewoman and to enrich his heritage. So he starts to have a regular correspondence with Lady Mary Hallen and, after a few months, he proposes to her to marry him. However, since Mary's arrival in Havana, Juan's existence is completely turned upside down. Despite his intention not to bond emotionally, he can't resist the young woman's charm and rebellious nature. Madly in love, he doesn't realize his wife's dark side immediately; nothing is really as it seems. In fact, the man ignores the existence of evil and of its several facets, until he knows the oldest of them: the original one.