El Marginal is an Argentine crime drama television series set in a maximum-security prison. The show follows the story of Miguel, a former police officer who goes undercover as an inmate to investigate a kidnapping case. As Miguel navigates the dangerous world of the prison, he uncovers a web of corruption, violence, and power struggles. With its gritty and intense storyline, El Marginal has gained critical acclaim for its realistic portrayal of life behind bars in Argentina.