Two ostensibly ordinary middle-aged couples, Marie and Vitek, and Dita and Ondra, are linked by more than just a lifelong friendship, they are linked by love. Both men, Ondra and Vitek, who are work colleagues, sincerely love their wives, but they both also harbor a secret yearning for the other's wife. When, by a stroke of fortune, the foursome finds themselves on an almost uninhabited island in the Caribbean, it's just a matter of time.