Bruce Willis plays a burned-out, alcoholic NYPD detective assigned the seemingly routine task of escorting a fast-talking, reluctant witness, played by Mos Def, sixteen blocks to a courthouse to testify, only to discover that corrupt fellow officers are determined to stop them from arriving alive. Director Richard Donner structures the film almost entirely in real time, with the tight geographical and temporal constraints heightening the tension as the walking distance becomes an ever-more dangerous gauntlet. Willis plays notably against type, aged and weary rather than his usual action-hero swagger, while Mos Def's chatty, asthmatic witness provides both comic relief and genuine pathos. Critics praised the film as a tightly constructed, character-driven thriller that elevated familiar dirty-cop-conspiracy material through committed performances.