In an interview to the online newspaper La Marina Plaza, director Óscar Aibar claimed that with the material compiled about the Nazis in Denia he could have film four movies.
The movie set mainly in summer of 1982. In the different visits of Andrés to the bar close to the police station it can be seen the bar customers watching on TV the Soccer World Cup, which was celebrated on Spain from June, 13 to July, 11 of this year.
During some conversations between Andrés and Colombo, Colombo reveals him his wishes of the winning of the socialists in the elections, in the hope to reveal the truth about the Nazis on Denia. It refers the Spain's general elections celebrated on October 28, 1982, which were won by Felipe González as leader of the PSOE (Partido Socialista Obrero Español; Spanish for Spanish Socialist Worker's Party).
When Colombo is in the hospital, he reveals Andrés the truth about his last name Expósito, telling that it was used by the Francoist authorities in the babies of the fathers killed in the Spanish Civil War, which were left in orphanages. This is historically true: for much years after the end of Civil War in 1939, which it established the Francoist dictatorship, an uncountable amount of parents of the Civil War's loser side were killed by the government (some during the war, others after the war when they were in prison), and their children were moved to orphanages stealing their own last names to be replace by Expósito (in addition to another more typical last names as Gómez, Pérez, González, etc.), destroying all the files relative to prevent that the children could find to their real parents when they grew up.