White line fever

A young Air Force veteran, Carrol Jo Hummer, starts a business as the owner-operator of a thirteen-speed, seven-and-one-half-ton diesel truck, which he dresses up and names The Blue Mule. With his bride, Jerri, he sets off to Tucson, Arizona, where his old friend Duane, the manager of a trucking company, gets him a job. But after Carrol Jo realizes he will be carrying illegal cargo and refuses the assignment, he₂s beaten by a band of gangsters wo...