The Ticking Man (2003)

One hitman has ten targets to kill in 28 minutes 36 seconds...In the remote west coast of Scotland, a drug dealer double-crosses and kills a drug trafficker. The dealer is arrested and learns that the murder was witnessed by a couple of anonymous locals. Facing life imprisonment, the dealer decides to hire a hitman to eliminate all the potential witnesses - everyone in the town. The hitman knows that it takes 28 minutes and 36 seconds before the police will arrive from the nearest cop shop. 28 minutes and 36 seconds to kill 10 people. Pandemonium ensues as he methodically hunts down his targets and people frantically try to stay alive.