 Erskine and Colby pursue a pair of bank robbers from Philadelphia to Oregon. The criminals, Perry and Shep, are an odd mix of urban and rural backgrounds. Perry plans the robberies while Shep (a "redneck" as Perry calls him) specializes in gun play. Their eventual target is the payroll of a tunnel construction project in Oregon. Along the way, Shep is drawn to a woman, who tries to play the criminals off each other. Shep also is a bit of ticking bomb. The FBI agents try to catch the criminals before fatalities occur.