Three students wander through the UNAM University City at the dawn of the October 2 massacre and in the midst of the 1968 student movement

The year is 2005, Juan Carlos works in the COBUP (committee to search for persons disappeared during the dictatorship), his main objective is to find his grandfather who disappeared in the 80s. In the middle of his search, his partner Karen tells him about a abandoned house where torture was possibly carried out and there could be buried bodies. Meanwhile Sub-Officer Alvarenga and Sub-Officer Martinez begin their shift without much emotion, having no idea of ​​what awaits them. Juan Carlos, defeated by his anxieties, goes to investigate the house to find that a piece of the dictatorship is still in force.

A man is killed and his friend is charged for the crime but he isn't guilty, he must now find the real murderer.