The film is based on the real experience of Antonio López Crespo, a lawyer for CONADEP, a Commission created in 1983 to investigate human rights violations in Argentina during the dictatorship called the National Reorganization Process (1976-1983), which produced the famous report Never Again. The film uses original material from recordings about the interrogations carried out by Antonio López Crespo of a torturer.
The two real characters on which the film is based were the lawyer Antonio López Crespo (interrogator) and Francisco Andrés Valdés (torturer).