Gil and Hank are two independent truckers who run into problems when they are forced to pay off traffic managers to get loads. They also have to pay off highway cops when their rigs are overweight and bank loans but consider themselves lucky just to be able to keep up the interest payments. Add to that a small, frizzy-wigged highway hooker named Janice, who tempts them with her lurid charms.

When petty criminal Luke Jackson is sentenced to two years in a Florida prison farm, he doesn't play by the rules of either the sadistic warden or the yard's resident heavy, Dragline, who ends up admiring the new guy's unbreakable will. Luke's bravado, even in the face of repeated stints in the prison's dreaded solitary confinement cell, "the box," make him a rebel hero to his fellow convicts and a thorn in the side of the prison officers.