Hitman Stuart Tilden seriously wounds a businessman in Chicago while seeking the whereabouts of his intended target. The FBI launches an intense investigation, seeking to prevent Tilden from succeeding, and even Assistant Director Arthur Ward will make an arrest in the field as part of the effort. The target is Richard Ghormley. Ghormley formerly worked for a criminal. While Ghormley wasn't involved with illegal activities, the criminal fears that Ghormley knows too much. Ghormley is desperately trying to get home on Christmas Eve from a business trip to San Francisco and Tilden is waiting for him there. Colby and other agents rescue Ghormley's children while Erskine confronts Tilden.