While working as a chauffeur for a wealthy family, Kimble learns that the teenage daughter of the family is dating the pool cleaner. While chaperoning a party for the daughter's friends, Kimble throws out a unruly young man who crashes the party. But Kimble is soon faced with a little blackmail when the man turns out to be a crime buff and recongizes Kimble from a police magazine.

Kimble arrives in the factory town of Hempstead Mills, West Virginia to assist Andrew McCallister, his longtime mentor whom is dying from lung cancer which he is confined to a wheelchair. McCallister's vigorous anti-smog campaign has earned him a reputation as a local crackpot. But the old man plans to go out with a bang; by having a bomb hidden in a package where he has Kimble deliver to the local factory. But when McCallister discovers that a group of school children will be inside the factory during a school tour at the time of the explosion, he dispatches Kimble to evacuate the building and deactivate the bomb before time runs out.