Jimmy Dove je strokovnjak za onesposabljanje bomb pri bostonski policiji. Po dolgih letih težkega dela se namerava v kratkem končno upokojiti in zaživeti mirno življenje z ženo Kate. Ryan Gaerty je izurjen strokovnjak za eksplozive, ki je pred kratkim pobegnil iz zapora na Irskem. Jimmy in Ryan sta stara sovražnika in ko se po dolgih letih spet srečata, se želi Ryan maščevati Jimmyju za greh iz preteklosti. To namerava storiti tako, da bo Boston spremenil v pravi ognjeni pekel.
Jimmy Dove works for the bomb squad in Boston and he is always the one who is on the tough jobs. One day he decides to quit the force and to become a teacher for the rookies of the squad. A few days later his former partner is killed by a bomb and Jimmy becomes suspicious that maybe this bomb could have been built by a former friend of himself. He begins to investigate and finds out that his worst nightmare has returned from his past.