The fact Chadwick Boseman's NYPD police detective locks down Manhattan Island as a means of hunting down two police killers is just a passing detail, really, but so little else of note happens in this police procedural - just several moments of clunky editing and a completely from-the-start predictable plot - it is the closure of the twenty-one exit points from Manhattan Island that gives this ho-hum crime drama its title!
★★☆☆☆
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