When massive earthquakes bring Los Angeles to its knees and cut it off from the rest of the volatile US, the surviving inhabitants scramble for their own survival. Decades later, three policing forces — often working against each other rather than together — try to keep the remnants of the city under their control.

Singer and St. Jude, two members of the Local Police Force, navigate the risky job of patrolling the hazardous streets, while a secret one of them hides will lead them to even more dangerous levels of trouble.