 Lyle, owner of the adjacent filling station, stops in on occasion to break the monotony with his cheery banter.The boring routine of the daily grind is disrupted with the arrival of two couples, the upscale Richard and Clarisse, and the younger and wilder Teddy, an unbalanced Vietnam War vet, and Cheryl, his hippie girlfriend.Complications arise when illegal drugs and guns enter the picture, and Teddy resorts to physical, mental, and emotional torture when he holds everyone hostage.