1937, Spanish Civil War. A man wakes up in the middle of a battlefield with amnesia. The soldiers of both trenchs do not recognize him, so nobody will help him. He is injured and his time is about to finish.

During the military dictatorship of Argentina in 1977, office clerk Francisco Sanctis, his wife and children lead a quiet life in Bueno Aires. But one day an old friend calls him after 20 years, asking him to sign something. When they meet, she explains that she actually wants him to warn two of her friends that are about to be kidnapped by the army, and Francisco must decide if he wants to risk everything for two strangers.

A journalist filming his 1st documentary when he meets CESAR MAYO, witness of the absolution of the murderer of his son. Cesar proposes that Iker film the preparation and execution of a revenge killing. Iker accepts with the goal of filming the preparation, but of stopping the crime before it actually takes place. Iker investigates the case of the murdered youth and the strange circumstances surrounding it. Meanwhile Cesar fine tunes his plan to manipulate the penal code to eliminate or at least minimize any punishment for the crime he is planning, so as to show how justice is an illusion. As he designs the plan to avenge himself on Fabian Arias, the alleged killer of his son, he uses the penal code and his plans for a legal defense to decide the form, timing and manner in which he will carry out his version of Justice.

A family is on holiday in 1991 when their teenage daughter decides to elope with her boyfriend. Their parents travel forward in time to 2022 and see how much Spain has changed in three decades.