Peter Williams is a salesmen extraordinaire who lives for the road. Infatuated by the inviting bottom on the cover of an erotic novel, Peter is determined to enjoy a spell with its owner, the lustrous Linnet, and her friends. Peter prides himself on driving a hard bargain, but with Linnet in his car, things get harder than he bargained for. Roadside breakfasts, flagellation, hot tarmac, and hotter sex follow as Linnet and her friends take Peter along a series of sexual byways that aren't on his roadmap.