"Makrina Ferrero" is a naive girl who falls in love with her boss at work, and because of that many crimes of accounting manipulation and embezzlement are committed. She is charged with four tax evasion offenses and is therefore sentenced to prison in the Cruz del Sur prison as a precautionary measure. She must face psychological trauma and what prison means to her, as well as the complex relationship between prisoners; including Zolima, The most dangerous female prisoners. Makrina will soon realize that changing and becoming a completely different person is the only way to survive in the seven years she has to spend there. At the same time, in order to pay the guaranty her family gets involved abroad, during the search for a large amount of hidden money somewhere, in a dispute with the companion "Zolima" who will sign the family "Ferrero" in an unenviable position.