A group of thieves and outcasts are living in a big abandoned movie theater where they have created a very friendly and very particular universe. The police will use all its resources to violate their space, but again and again fail in their attempts.
Commissioner Leon (Miguel Angel Landa) investigates the murder of a woman in a population near the capital. The woman was raped before death and the case is complicated when his brother becomes the prime suspect, since it is a priest (Eduardo Serrano). Because of the implications that inquiries might have, Leon is pressured to keep the event as a "crab" (Cangrejo, or a unsolvable case), but he decides to comply with the law.
Carmen is a beautiful woman working in a business that is dedicated to smuggling. One day, Carmen fights and hurts to a smuggler woman, so a sergeant in the National Guard, José Navarro, stops detain her. In doing so he also falls in love with her, but jealousy will destroy his passion.