 While pursuing wanted felons Lewis Bateman and Chick McNabb, Officer Wayne Hoffman loses control of his motorcycle and finds himself taken hostage. He is able to depress the "send" button on his radio undetected and the constant signal helps Dan Mathews and his officers utilize "triangulation" radio equipment to pinpoint Hoffman s location. The signal is lost when the felons transfer Hoffman and his motorcycle to a closed panel truck but he is eventually able to depress the button again. Dan enlists the aid of a bus to set up a roadblock that will not arouse Bateman and McNabb s suspicion while he and his officers position themselves for an attempt to capture the felons and rescue Officer Hoffman.