This standard erotic thriller set in St. Tropez involves an unusual ménage à trois first there is Claude, a mother approaching 40 who is also approaching a liaison with the second and pivotal figure in the trio; Romain (Bernard Giraudeau), a Don Juan who is not above pimping on occasion and who is also attracted to Claude; and thirdly, the neurotic Chris (Valèrie Kaprisky), Claude's sexually fixated young daughter. As flashbacks show Chris seducing a former lover and symbolism likens her to a jellyfish whose sting can be fatal, the scenario is set for real trouble -- especially since Chris is angered that Romain obviously avoids her and just as obviously will end up as her mother's lover. Sex, hatred, and fear combine to bring the unbalanced relationships to their final resolution.