Nikki and Roberto, managers of a gas station, spend happy days and spend their free time on less than innocent pleasures. Roberto, obsessed by sex, doesn't frown upon spicing up their lovemaking by inviting beautiful vacationers to join them in their sex games. But one day, David, a rich lord of the manor, comes by to get a full tank for his Rolls. Served by the beautiful Nikki, David falls immediately in love with her who, despite the jealousy of her husband, is not insensitve to the affluence displayed by the young man. In order to neutralize the jealous husband, David picks up a high-end call-girl to use her charmes under the false pretexte of a car breakdown to tie up Roberto and to "take advantage of" the right moment. Roberto quickly succombs to temptation. Taking advantage of Roberto's absence, David invites Nikki to accompany her to the castle. At first reluctant, she ends up letting herself get swept away