Warner Bros Production, together with the Spanish directors Chema de la Peña and Antón Laguna and the producers Ignacio and Gonzalo Salazar Simpson, bring to the big screen a tape-based on real events that occurred in Spain on February 23, 1981, when he was the victim of a failed coup attempt by the military forces of that country, being the first to report what happened.
On February 23, 1981, Lieutenant Colonel Antonio Tejero, together with his Civil Guard men, assaulted the Palace of the Courts in Madrid, headquarters of the Congress of Deputies and the two General Courts of the Spanish parliament. There was the appointment as the democratically elected president of the candidate by the political party Union of Democratic Center, Leopoldo Calvo Sotelo.
Commander Tejero takes the Palace of the Cortes and all those who were there as hostages, the coup begins, the authorities are dismayed by what happens, the executive power faces a temporary vacuum and the Spanish monarchy must intervene.
The armed forces of that country are divided, on the one hand, there is great discomfort from the economic difficulties that the country is going through; on the other hand, a more radical group that does not accept the nascent democracy after the fall of the dictator, Francisco Franco.
The government of Adolfo Suárez, who was proclaimed president in nineteen seventy-six, failed to solve the most serious problems that the population suffered, as a spearhead we have the economic problems they suffered at the time, and a new territorial organization of the country; and if that adds to the terrorist attacks of the ETA, they have the perfect equation for a military uprising.
The Spanish monarchy represented by King Juan Carlos I, tries to contain a greater outburst within the military bases, for it works hand in hand with the military high command who put order to their subordinates and extinguish the fire of step within their ranks; at the same time, King Juan Carlos I organizes the civil security forces, call himself a police officer, to maintain order in the streets and avoid a disaster.
Away from the Palace of the Courts in Madrid, another soldier stands and takes the city of Valencia, it is Captain General Jaime Milnas del Bosch, in charge of the 3rd Military Region of the country located in the province of Valencia.
Milan's del Bosh orders all his motorized troops to go out to the streets of the city to calm the moods of the town, and places armored vehicles of war in strategic points condemning the entrance and the exit of the place, the Captain-General declares a state of exception. The situation seems to be controlled and the Duke of Ahumada operation a success, in Central Palace two hundred officers armed with rifles retain power.
For King Juan Carlos I there is no other solution than to dialogue, the military high command headed by the newly appointed second chief of the Spanish army's general staff, General Alfonso Armada, a highly trusted man of the King suggests a series of actions that could contain the coup and calm the country; but what he doesn't know is that Armada is part of the Duke of Smoked operation; however, their actions do not point precisely to what has been established, Armada wants to give a peaceful coup d'etat.
His plans are to lead the dialogue group with the insurgents and propose a peaceful solution that passes through a transitional government until reaching a consensus between the parties and returning to the voting, but in that transitional government, it would be the one who occupied the chair presidential. In this way, the events of that fateful day were going on during which the Spanish people spent the worst eighteen hours of their democratic history.