This docuseries attempts to unravel the 18-year-old mystery surrounding the death of Nora Dalmasso, a mother of two who was found strangled in her home in an affluent Argentine city. Dalmasso's body was found in her daughter's bedroom, with the cloth belt of her robe double-knotted around her neck. Eighteen years after the incident, Dalmasso's killer has still not been brought to justice by authorities in Argentina.