White Line Fever is a 1975 action-thriller film directed by Jonathan Kaplan and starring Jan-Michael Vincent as Carrol Jo Hummer, an independent truck driver who returns home from the Vietnam War to find his hometown in Arizona overtaken by corruption and greed. In order to provide a stable life for his pregnant wife, Jerri Kane (Kay Lenz), Carrol Jo decides to become an independent trucker. He purchases a used truck and starts his business, but soon finds himself in a dangerous battle with a gang of criminals who hijack his cargo.
The gang is headed by Cutler (Slim Pickens), a powerful and wealthy businessman who controls the local trucking industry. Cutler and his men use violence and intimidation to force independent truckers out of business, and Carrol Jo soon learns that his trucking route is also being targeted. Despite threats and attacks from the gang, Carrol Jo refuses to give in and stands up for his livelihood and his family.
Along the way, Carrol Jo forms alliances with other independent truckers who are also struggling to survive in a corrupt system. Together, they plan to fight back against Cutler and his men. Their efforts lead to an explosive and action-packed final showdown, where Carrol Jo uses his skill as a truck driver to outmaneuver his enemies and defeat them once and for all.
White Line Fever is a classic 1970s action film with a strong message about the power of standing up against corruption and fighting for what is right. It is also notable for its realistic portrayal of the challenges faced by independent truckers during this time period.