Angela is a young teacher of school, very beautiful charmer and. Her unique family is her mother, Delia, an ill and bitter woman. In his I milk of death, Delia makes swear to Angela who will prevail in the life, and with his last breath she curses the woman who robbed the love to him of the father of Angela, Emilia Santillana.

When listening finally the name that Delia always refused to reveal to him, Angela, oath that will not rest until finding it and making pay it by to have destroyed the life of its mother.

Emilia Santillana is a beautiful and distinguished woman that resides Beyond in the city of San Miguel. She is owner of a mine and a factory. A day Angela appears in the company in search of use. Yolanda Rivas, the right hand of Emilia, feels sorry itself apparently of the sweet and timid girl and convinces Emilia she contracts that it.

Little by little Angela is gained his confidence. Convinced that their actions are justified, Angela is worth of his beauty and its increasing influence in the company to destroy the world of Emilia step by step. Only one person distrusts of her, Mariano Bautista, a young engineer of mines.