When a small-town Irish cop with a crass personality is partnered with a straight-laced FBI agent to bust an international drug-trafficking ring, they must settle their differences in order to take down a dangerous gang.

An earthquake shatters a peaceful Los Angeles morning and opens a fissure deep into the earth, causing lava to start bubbling up. As a volcano begins forming in the La Brea Tar Pits, the director of the city's emergency management service, working with a geologist, must then use every resource in the city to try and stop the volcano from consuming LA.