Laura Regueira is wrongly accused of the murder of her boyfriend, he was killed by a band of thugs the night they were sharing a romantic moment. In the woman's reformatory Laura, besides of having to endure the life of prisoner, will have the chance of prove her innocence, with the help of a police officer who believes she's innocent Laura has the chance of uncover a band involved in drug traffic. These delinquents also use the women captive in the penitentiary as prostitutes.