Gabriel and Demián are identical twins but very differents. Gabriel grew up in the high society while his brother grew up in poverty which caused him to have a grudge against Gabriel and wants to destroy him. Gabriel is a widow who remarried to the hysterical Joselyn. An accident makes Joselyn miscarry and causes disability to Luisito, the son of her and Gabriel. Joselyn blames her husband and makes his life miserable, with help from her mother Miriam and her daughter Karen from her first marriage. They are the "beasts" that destroy Gabriel. One day a young humble named Mariángela comes to the mansion to teach Luisito, and Gabriel falls in love with her. The "beasts" takes charge to destroy Mariángela, especially when they discover that she is the illegitimate daughter of Don Clemente, Miriam's husband and father of Joselyn.

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