A year earlier, Camila tells her family about her dream of becoming a journalist and leaves Guadalajara. In 1985, an hour after the earthquake, signs of life are found under the rubble at the General Hospital. Gabriela, worried about her children, heads back to Tlatelolco amidst the chaos. Meanwhile, Camila discovers a group of women trapped in a garment factory.

In the 1950s, Ignacio promises his dying mother that he will always take care of his younger brother, Ángel. In 1985, two hours after the earthquake, Ángel continues his rescue efforts when Ignacio visits him. Camila encounters Gabriela near Tlatelolco, where the police are not allowing anyone to enter. Beneath the rubble, Alberto finds another survivor.

Some time ago, Ángel was starting a family, but the mistakes he made in the past continue to haunt him. Now, four hours have passed since the earthquake. Rescue operations at the hospital are ongoing with the help of students. Efforts to rescue survivors in Tlatelolco continue. Deep within the rubble, someone is calling for help.

For Camila, surviving and adapting to the world of news in the capital was not easy, but everything has prepared her for the present, where five hours have now passed since the earthquake. An incident involving Ángel, Ignacio, and Camila triggers a race against time to request foreign aid. The government's intentions and Ignacio's alignment are finally revealed.

Six hours after the earthquake, Chave and Pepín find themselves caught off guard by a crucial decision. In Tlatelolco, the relentless efforts and hours spent removing rubble are paying off; Gabriela and Alberto are getting closer to their children. Beto searches for a way out, while Pablo and Lucía hold on as best they can. Meanwhile, in the hospital rubble, the nurses begin to lose hope.

Months earlier, Lucía and Pablo fall in love during a band rehearsal, with Lucía providing Pablo refuge from his home problems. Now, eight hours after the earthquake, they remain trapped under the rubble, running out of oxygen. At the General Hospital, a miracle amidst the tragedy occurs. Meanwhile, Camila, deprived of her freedom, may receive help from an unexpected source.