21 Bridges is a police drama set in New York. A late night gunfight leaves eight NYPD officers dead. In the immediate aftermath detective Andre Davis (Chadwick Boseman) is put in charge of apprehending the fugitives and he closes down all 21 bridges into Manhattan. Andre is assigned detective Frankie Burns (Sienna Miller) to help him and liaison with 85th precinct who polices this area and whose officers were murdered.

Meanwhile friends Michael (Stephan James) and Ray (Taylor Kitsch) are on the run with a whole lot of cocaine because the small-time dealer they robbed was actually a major middle-man working with the police. With the whole of 85th precinct searching for them they know that if they're caught they're dead lending a kill or be killed mentality whilst Andre is sort of in the middle of this as the lone outside officer...

The movie takes place over a few hours from around midnight to early morning. Action ranges throughout Manhattan showing off the night life of the city that never sleeps. There are sharp and vicious gunfights and a pretty good ending. It's a pretty well implemented $33M movie.