While on a road trip, Hunter Scott proposes an idea to his wife, Isabel, and best friend, Drake Nielson—he asks them to sleep together while he watches. While Isabel and Drake initially reject it, they can't deny that the proposition gives them all a thrill, and eventually they give in to Hunter’s wishes. As the three of them grow closer over the days of the trip, Hunter comes to realize that he is just as attracted to his best friend as he is his wife. Can they find a way to navigate a polyamorous relationship once the trip is over, or will it all come crumbling down around them?