Some time ago, Angel was starting a family, but the mistakes he made in the past follow him to the present, where it has been 4 hours since the earthquake. Rescue work at the hospital continues now with the help of the students. In Tlatelolco, attempts to rescue survivors continue. Deep in the rubble, someone calls for help.

The earthquake, which has already happened 6 hours ago, took Chave and Pepín by surprise in the middle of an important decision. In Tlatelolco, the efforts and hours of work removing rubble have paid off, Gabriela and Alberto are getting closer to their children; Beto tries to get out, Pablo and Lucía hold on as best they can. In the rubble of the hospital, the nurses begin to lose hope.