Locked Up is a gripping Spanish television series that follows the story of Macarena Ferreiro, a naive young woman who is sentenced to prison for tax evasion. Set in a women's prison, the show delves into the complex relationships and power dynamics among the inmates. With its intense plot twists and flawed yet compelling characters, Locked Up has gained a worldwide cult following. The series explores themes of survival, loyalty, and the resilience of the human spirit.