As a series of minor earthquakes start tearing apart Los Angeles, scientist Emily of the USGS theorizes that it's all building to a super quake that will drop the entire city into a lava-filled chasm. Engineer Jack whose daughter has gone camping in the danger area and whose company is responsible for the quakes due to their Hydraulic fracturing feels obligated to help, and races with Emily through the increasingly damaged city with the hopes of diverting the epicenter to Palm Beach and potentially saving millions of lives in the city of Los Angeles.