Thirty years old and reeling from her mother’s recent death, Frances feels as if she’s lost her sense of purpose and her joy. When she suggests to her husband, Ben, that they open their marriage, he’s willing --- and maybe even a little intrigued. They invite a young woman into their bedroom, create a joint dating profile, and go on dates with other exploring couples. Over the next five years, they explore their sexualities, navigating through jealousy, betrayal, desire and obsession. The friends and lovers in their circle find themselves asking new questions about their own lives and relationships. When Ben finds himself falling in love with another woman, just as Frances realizes she’s ready to settle down and have a baby, they’re forced to confront the consequences of their experiment.