Some famous moviestar named Brody gets himself arrested. His punishment: riding along with a cop. Of course they don't get along; the cop (Dave) doesn't want to babysit, but the actor tries to be friendly and eventually wins Dave over. Dave agrees to take him to the clubhouse--his former unit's station. Dave was SWAT but for some reason, that we don't find out, he's now assigned to low-level tasks. We meet his unit made up only of another guy, a little girl, and a rookie.
Elsewhere some paramilitary guys are up to no good. They set up on someone's ranch after killing the owners.
It's late at night but for some reason a network repair team arrives. Of course they are bad guys and detonate an EMP device that cripple the station's electronics. They are also forced to kill some security guards there. This is witnessed by Brody but no one pays attention to him. Eventually Dave and the rest of the unit realize what's going on and a shootout ensues. The bad guys are directed by the paramilitary guys off-site led by Korver.
After SWAT takes control of the situation they finally get around to wondering what the bad guys were doing there to begin with. There's some underground rooms that include an evidence locker. We learn that Korver wants some bearer bonds stored there so he organizes an assault on the station. Our SWAT guys of course are undermanned and underarmed since stuff is being moved to another station.
There are a couple of surprises and lots of exciting action. The main cast is very strong with Purcell, Lang, Glover, Jones. Some of the rest of the cast are weak. The other SWAT don't look the part at all. The story is good though as it goes beyond just action. But the action does shine here. There is no shortage of B-action movies with one or two big names, but Gridlocked is better than most A-action movies that are released in theaters.