Newlywed Yuna lives with a husband whose business plan has failed, so she takes a part-time delivery job to help support the household. Her trainer is an older, married veteran driver who teaches her every part of the route while subjecting her to increasingly aggressive harassment. He eventually assaults her in the vehicle and forces a sexual relationship. Unlike her sexless husband, the rough, crude driver overwhelms Yuna until pleasure gradually conquers both her body and mind.