When police officer Bishop (Austin Stoker) is left in charge of Precinct 13 on the last day it's open, he isn't prepared for the onslaught of a murderous street gang who have come into the possession of an enormous arsenal of guns.
Finding himself trapped in the precinct with a pair of secretaries (Laurie Zimmer and Nancy Loomis), a few civilians and a handful of prisoners, Bishop is unable to call for help because the phones have already been disconnected and the precinct is in a run-down, out-of-the-way neighborhood.
Holding out for a rescue, he and his fellow prisoners band together to barricade themselves in and hold the bandits at bay. But as the casualties mount and the supplies run low, they must choose between a daring escape attempt, a fiery offensive, or certain death.
The sophomore feature from auteur-in-the-making John Carpenter, Assault on Precinct 13 reunited the director with Douglas H. Knapp, his cinematographer on 1974's Dark Star.