Audrey attempts to stop her brother from marrying a young French woman during their rescheduled wedding weekend in the Hamptons, which happens to be the same weekend she turns 40.

With the wedding of her younger sister fast approaching, Kat Ellis faces the undesirable prospect of traveling alone to London for the ceremony. While this is bad enough, Jeffrey, the man who left her as they moved closer to marriage, happens to be the groom's best man. Determined to show everyone -- most of all Jeffrey -- that her romantic life is as full and thrilling as ever, Kat hires a charming male escort as her date.

Alliances are tested when seven college pals reunite to watch two of their own say “I do” at a seaside wedding. But the maid of honor and the groom share a passionate history, and the bride isn’t the only one who’s wondering if it’s all in the past.