After ending his career in the smoke of war, former American soldier Raymond Gaines (Dwayne Johnson) has now become a helicopter rescuer for the Los Angeles Fire Department. Although he works hard, is respected and trustworthy, none of these can save his failed marriage. After a short vacation, Ray returned to work. At this time, a once-in-a-century earthquake occurred in southern Nevada, and the Hoover Dam was completely destroyed in the strong earthquake. Not long after, another round of strong earthquakes hit Los Angeles from San Francisco. Ray witnessed the terrible scene of the prosperous city turning into ruins in a helicopter. At this time, his wife Emma (Carla Gugino) and daughter Blake (Alexandra Daddario) are now in two cities. In order to save the two people he loves most, he is alone, bravely moving forward, and racing against the earthquake...